Case Study: Avoiding a 26-Week Delay with Stocked DFARS Screws

Posted: December 16, 2025 | Author: mfsupplyblog | Filed under: DFARS, Domestic Fasteners, keensert, key-locking inserts, Mil-Spec Fasteners, Socket Head Cap Screw, Socket Products | Tags: Case Study, Certificate of conformance, COC, DFARS Compliant, Domestic Fasteners, manufacturing, Mil-spec, Mil-spec fasteners, Mil-Spec Fasteners Cross-Reference, Mil-Spec Fasteners Distributor, Mil-Spec Fasteners Supplier, Mil-Spec Socket Cap Screws, MTRs, Precision Engineering, Precision Manufacturers, Socket Head Cap Screw | Leave a comment

A Buyer’s Case Study on Compliance + Speed

If you sell into the defense or aerospace industry, “finding a screw” is never just finding a screw. The part has to be dimensionally and chemically correct and compliant, with the documentation to prove it.

This is where many procurement teams get stuck: the hardware exists, but the paper trail doesn’t… or the lead time blows up the schedule.

The MF Supply Value Proposition

If you have a commercial part on a BOM that now needs DFARS / Buy American + documentation, MF Supply helps you do one of two things:

Convert the requirement into the correct Mil-Spec / spec-controlled equivalent (form/fit/function + compliance + paperwork).

Source or produce a DFARS-compliant version of a commercial catalog part with shorter lead times and with the right cert package.

You get the part you need, on time, with the compliance paperwork you need without playing supplier roulette.

What DFARS/Buy American Actually Means for Fasteners

For fasteners made from specialty metals (including many stainless and high-alloy steels), DFARS requires qualifying melt/manufacture origin. But the “gotcha” is simple: If you can’t document it, it doesn’t count.

Typical documentation packages include:

Manufacturer Certificate of Conformance (COC)
Country-of-origin / DFARs specialty metal compliance statements
Material Test Reports (MTRs)

Visit the DPC website, section 252.225, to keep up to date with DFARs requirements, which were updated January 2023. Click here and scroll to 7009 for more information: 252.225-7000 Buy American Act – Balance of Payments Program Certificate.

The Challenge: Compliant Part, Short Lead Time, Complete Documentation

Many “available” fasteners on the market are:

Not DFARS compliant
Not available with COC/MTR
Not stocked (or stocked without the right chain-of-custody), leading to long lead times

The Situation: “We Need It Now… and It Needs To Pass Audit.”

A manufacturer supporting a defense aerospace assembly needed a 10-32 x 3/4 socket head cap screw in 300-series stainless. The Bill of Materials (BOM) required:

DFARS-compliant specialty metal
Manufacturer COC
MTRs / test reports
Documented material origin

Their incumbent supplier quoted 26–30 weeks. That was a hard no.

The Solution: Cross-Reference to an In-Stock Mil-Spec Option (With Paperwork)

The buyer searched for DFARS-compliant 10-32 x 3/4 socket head cap screws in stainless steel and landed on MF Supply’s product page for: NAS1351C3-12 (10-32 x 3/4) Mil-Spec socket head cap screw, stainless, DFARS

MF Supply worked with the buyer to:

Confirm the correct spec-controlled requirement
Pull active inventory from a qualified supply chain
Provide COC + MTR documentation
Confirm DFARS specialty metal origin with documentation

The result

26+ week production delay avoided
Compliance risk eliminated
Audit-ready paperwork shipped with the order

When Cross-Referencing Helps (And When It Doesn’t)

Cross-referencing can reduce lead times and risk when it’s validated upfront:

Form/fit/function confirmed
Spec requirements verified (AN/MS/NAS/NASM, etc.)
Documentation requirements confirmed (COC, MTR, COO/DFARS statements)

Substitution only works when the part and the paperwork both match the requirement.

Buyer Takeaway: In-Stock + Paperwork=Shorter Lead Times, No Surprises

If your customer needs DFARS / Buy American compliance, always ask:

Can you provide a COC?
Can you provide DFARS specialty metal documentation?
Is material origin documented?
Is it in stock, or are you quoting a 20–30 week lead time?

At MF Supply, inventory is backed by documentation, so you don’t have to choose between speed and compliance.

Need DFARS-compliant screws fast and with paperwork?

Send your part number, drawing, or BOM requirements. We’ll confirm the right spec, validate compliance, and quote the fastest safe path.

And yes, “finding the right screw for you” isn’t just our tagline. It’s our favorite sport.

Related:

Book a one-on-one consultation with our President, Robin, to discuss how MF Supply can help you solve your Industrial Sourcing, Fastener, and Safety concerns.

Your Purchasing Department’s Secret Weapon!
Here are 5 reasons to buy from MF Supply

We Source and Deliver What Others Can’t, Faster Than You Imagined – With speedy solutions for elusive parts and lengthy delivery times – We’ve got you covered with both custom-made specials (send us your prints!) and hard-to-source options, quickly and at a fair price.
Cost-Effective Functional Equivalents to OEM Brand Fasteners-Why Pay More? – Reduce lead times and costs with the same quality and same performance. Try us for alternatives to brands like McMaster-Carr, MSC, Misumi, PEM, and RAF and experience unmatched savings! Same form, fit and function for less.
Huge Selection of Certified and Commercial Hardware with Same-day Shipping Available for Countless Items – We source and stock standards, specials, commercial, Mil-Spec & OEM brands in inch and metric sizes. Standards include AN, NAS, MS, IFI, ASTM, ASME, DIN, ISO, JIS. We are sourcing experts for inserts, certified Mil-Spec parts and anything in stainless steel. Many parts are available with manufacturers’ certifications, including DFAR, ROHS and CoC. Trust us to ship on-time from our national distribution centers.
A User-Friendly, 24/7 Online Shopping Experience – Enjoy a 24/7 online shopping experience with easy-to-use filters, detailed product information, and a constantly updated technical directory. Sign up now for a seamless experience!
WBE/WOSB Certified Woman-Owned Small Business – As a certified Woman-Owned Small Business, we support your diversity goals. Trust us to meet your fastener and sourcing needs with expertise and efficiency [Cage Code 58QG4].

MF Supply is a WBE/WOSB certified supply chain partner to business, industry and government. We are sourcing experts and stocking distributors of Hardware, Precision & Mil-Spec Fasteners and Safety supplies. For more than 50 years, we have been supplying manufacturers in the electronics, industrial, commercial, aerospace and military markets with the full range of fastener products and services. Our Cage Code is 58QG4 and our registered name is RL Supply Inc dba MF Supply.

How to Use MF Supply’s Cross-Reference Tables to Find Equivalent Fasteners Faster

Posted: November 18, 2025 | Author: mfsupplyblog | Filed under: Branded Fasteners, Commercial Fasteners, Cross Reference Charts, dowel pin, E-Z LOK, Functional Equivalents, helical wire inserts, keensert, key-locking inserts, Metric Fasteners, Mil-Spec, Mil-Spec Electronic Hardware, Mil-Spec Fasteners, Precision Shoulder Screws, Threaded Inserts | Tags: Hardware, Helical Inserts Cross Reference, Keenserts, Keenserts Cross Reference, manufacturing, Metric Fasteners Cross-Reference, Mil-Spec Fasteners Cross-Reference, MS51830, ms51831, MS51832, Precision Engineering, Precision Manufacturers, Precision Shoulder Screws Cross Reference, threaded inserts | Leave a comment

Many popular fastener brands, from Keensert® key-locking inserts to precision shoulder screws, have alternative form-fit-function equivalents available in Mil-Spec, commercial or generic versions. The fastest way to identify the right alternative without guessing is by using cross-reference tables.

At MF Supply, we’ve built and curated multiple product-specific cross-reference tables so buyers can confidently match OEM brands, Mil-Spec part numbers, and generic equivalents, saving time, money, and lead time risk, while maintaining quality and compliance.

Below is your quick-start playbook.

What Product Categories Have Cross-Reference Tables?

We currently publish, maintain, or reference cross-reference data for high-demand categories. On our website, the Inch, Mil-Spec & Metric Fasteners Cross-Reference Charts category serves as your central hub. Once there, you can drill down into specific product families:

Each product family/category links to cross-reference charts that map:

OEM brand part numbers/products
Mil-Spec (MS, NAS, MA, NA) series (if applicable)
Generic functional equivalents
Sizes, materials and other specifications

Popular product categories include adhesives and sealants, anchors, bits and nutsetters, cage nuts, flex type lock nuts, handles, Keenserts®, knurled thumb screws, nylon insert stop nuts, precision shoulder screws, retaining rings, rivets & blind threaded inserts, self-clinching, fasteners, spacers and standoffs, speed clips, spring nuts, weld nuts, weld studs, and woodworking screws.

Brands Commonly Included in Cross-Reference Comparisons

3 STAR RIVETS USA, ABBATRON®, ALCOA, AMATOM®, APEX®, ARCONIC®, ATLAS®, AVDEL®, AVK®, B. F. GOODRICH, BOLLHOFF, BUCKEYE, CAPTIVE, CELUS®, CHERRY®, CONCORD, EZ-Lok, FASTENAL, GESIPA®, GRIPCO®, GLOBE ELECTRONICS, GRAINGER, H. H. SMITH, HOWMET, HUCK, INDUX, INTERFAST, KEENSERT®, KEYSTONE, LOCTITE®, LYN-TRON, MACLEANESNA®, MARSON®, MCMASTER-CARR, MISUMI, MSC INDUSTRIAL, PEM®, PIC DESIGN®, POP®, POWERS®, QUICKSCREWS, RAF, RED HEAD®, ROTOR CLIP®, SHEREX, SIMPSON, SOUTHCO®, SPS TECHNOLOGIES, TINNERMAN®, UNICORP, U. S. ANCHOR. VIP, W. M. BERG, W. W. GRAINGER, WALDES TRUARC® and many more.

How to Use Our Cross-Reference Tables (5-Step Method)

When you’re chasing cost savings, cutting lead time, or finding a compliant alternative, our cross-reference charts make it fast and fail-proof. Here’s the playbook:

Visit our Cross-Reference Hub
Head to the Inch, Mil-Spec & Metric Fastener Cross-Reference Charts on mfsupply.com.
Select Your Product Category
Pick the family you’re working with (Keenserts®, shoulder screws, dowel pins, etc.).
Locate Your Identifier
Find the OEM brand part number or Mil-Spec/NAS/MA/NA code inside the chart.
Match the Technical Requirements
Click through to the referenced item and verify the functional equivalency: material, plating/finish, thread/diameter, length, fit/series, and any spec callouts.
Order or Request a Quote With Requirements
Purchase online or submit an RFQ — and let us know if you need COC, MTR, DFARS, REACH/RoHS, Country of Origin, or other compliance docs.

When to Cross vs. When to Stay On Brand

Fastener buyers often ask: How can I determine if I must use the brand name or if I can cross to a generic part?

Use this handy 4 point checklist as your guide:

Does your bill of materials specifically call for the OEM brand-name fastener or component?
Can you live with the lead time or will having parts sooner improve delivery of the final product?
Will your supplier provide a certificate of conformance?
Will saving money help you be more competitive?

Do not cross when:

The BOM mandates the OEM brand, and the end customer may not be flexible
Traceability or contract terms prohibit substitution

Case Studies Proving It Works

Product Type	Result	Savings	Lead-Time Impact
Precision Shoulder Screw	Crossed to 8 valid equivalents	Major cost reduction	Immediate availability
Keensert® Key-Locking Insert	Crossed to Mil-Spec equivalent	59% saving	28 weeks → 5 weeks

Need Help? We’ll Build the Cross For You

If you’re unsure, send us the part number, drawing, photo, or BOM section. We’ll match it, validate compliance, and offer your best-value, best-availability option.

Email RFQs to: sales@mfsupply.com

“Finding the right screw for you” is our tagline after all!

Book a one-on-one consultation with our President, Robin, to discuss how MF Supply can help you solve your Industrial Sourcing, Fastener, and Safety concerns.

Your Purchasing Department’s Secret Weapon!
Here are 5 reasons to buy from MF Supply

We Source and Deliver What Others Can’t, Faster Than You Imagined – With speedy solutions for elusive parts and lengthy delivery times – We’ve got you covered with both custom-made specials (send us your prints!) and hard-to-source options, quickly and at a fair price.
Cost-Effective Functional Equivalents to OEM Brand Fasteners-Why Pay More? – Reduce lead times and costs with the same quality and same performance. Try us for alternatives to brands like McMaster-Carr, MSC, Misumi, PEM, and RAF and experience unmatched savings! Same form, fit and function for less.
Huge Selection of Certified and Commercial Hardware with Same-day Shipping Available for Countless Items – We source and stock standards, specials, commercial, Mil-Spec & OEM brands in inch and metric sizes. Standards include AN, NAS, MS, IFI, ASTM, ASME, DIN, ISO, JIS. We are sourcing experts for inserts, certified Mil-Spec parts and anything in stainless steel. Many parts are available with manufacturers’ certifications, including DFAR, ROHS and CoC. Trust us to ship on-time from our national distribution centers.
A User-Friendly, 24/7 Online Shopping Experience – Enjoy a 24/7 online shopping experience with easy-to-use filters, detailed product information, and a constantly updated technical directory. Sign up now for a seamless experience!
WBE/WOSB Certified Woman-Owned Small Business – As a certified Woman-Owned Small Business, we support your diversity goals. Trust us to meet your fastener and sourcing needs with expertise and efficiency [Cage Code 58QG4].

A286 Stainless Steel Keenserts®: Stronger Threads for High-Temperature & Corrosive Applications

Posted: August 19, 2025 | Author: mfsupplyblog | Filed under: A286 Keenserts, Fasteners, keensert, key-locking inserts, Threaded Bushing, Threaded Fasteners, Threaded Inserts | Tags: A286, A286 Keenserts, A286 Keylocking Inserts, A286 Stainless Steel, A286 Stainless Steel Keenserts, Inserts, inserts for manufacturers, Keenserts, Key Locking Inserts, manufacturing, Metric A286 Keenserts, Mil-Spec A286 Keenserts, threaded bushing, threaded fastener | Leave a comment

If your next thread reinforcement or repair project involves corrosive, high-load, or high-temperature conditions, A286 stainless steel Keenserts® (key-locking inserts) may be your best choice.

In this guide, you’ll learn:

What A286 Superalloy is
Key benefits of using A286 Keenserts®
How to identify A286 in part numbers
Available series and styles
Industries and applications that rely on A286 Keenserts®

What Is A286?

A286 is an iron–nickel–chromium stainless steel superalloy known for:

High strength (maintains properties at up to 1300°F / 700°C)
Excellent corrosion & oxidation resistance
Performance in both extreme heat and low-temperature environments

It is widely used in gas turbines, aerospace components, and assemblies that face frequent exposure to extreme conditions. This alloy can also be age-hardened to improve ductility in notched sections.

Why Choose A286 Keenserts®?

Keenserts® are solid, one-piece threaded inserts designed for permanent, high-strength threads—especially in softer materials or under intense heat and torque.

Here’s why A286 stainless steel Keenserts® stand out:

1 – High-Temperature Strength

A286 retains its strength where others fail—ideal for exhaust zones, turbines, and engine bays. Its oxidation resistance and heat-treat response ensure long-lasting performance.

2 – Mechanical Locking Keys

Drive keys lock the insert into the parent material, resisting torque-out and rotation even in vibration-heavy assemblies. This ensures reusable, secure threads during multiple maintenance cycles.

3 – Aerospace-Grade Quality

With minimum tensile strength of 140 ksi, finishes meeting AMS 2700 / ASTM B700, and 302 CRES keys, these inserts meet stringent military and aerospace specs.

4 – Simple Installation

Uses standard drills and taps—no STI tap required. Just tap the hole, insert, and drive in the keys. For parent materials harder than RC30, a broaching tool is recommended to cut key slots.

Note: A286 can be costlier and harder to machine, with potential long lead times.

How to Identify A286 in Part Numbers

Look for these designators:

Mil-Spec: CA (e.g., MS51831CA204, NAS1395CA6)
Commercial: JT (e.g., KNH624JT)
Metric Commercial: T (e.g. KNCM4x0.7T)
Metric Mil-Spec: NA Series NA0147, NA0149, & NA0151

Example:

MS51831CA204, NAS1395CA6, and KNH624JT all describe the same insert:
3/8-24 ID x 9/16-12 OD Heavy-Duty A286 CRES Key-Locking Insert.

A286 Keenserts® Series & Styles

Beyond their core benefits, A286 Keenserts® key-locking inserts come in a range of specialized series designed for specific applications:

Miniature (KNC) & (NA0147): Ultra-lightweight for electronics & avionics. Inch/Mil-Spec (2-56 to 1/4-20), Metric (M2–M4).
Thin Wall (KN/KNM) & (NA0149): For tight spaces; precision engineering. Inch/Mil-Spec (10-24 to 1/2-13), Metric (M5–M12).
Heavy-Duty (KNH/KNHM) & (NA0151): For high-stress uses—automotive, heavy machinery. Inch/Mil-Spec (1/4-20 to 7/8-14), Metric (M4–M24).
Extra Heavy-Duty (KNHXH): For extreme load and torque; industrial & military. Inch/Mil-Spec (1/4-20 to 7/8-14). No Metric Option.

Other Series and styles, including Floating (KNK) Key-locking inserts may be available for special order.

In general, A286 Keenserts® will be manufactured to meet aerospace and military standards: MS51830CA, MS51831CA, MS51832CA, NAS1394CA, NAS1395CA, NA0147, NA0149, NA0151.

Industries That Rely on A286 Keenserts®

Aerospace: Structural components exposed to heat, load, and vibration.
Oil & Gas: Equipment facing high heat and corrosion.
Automotive & Defense: Frequent assembly/disassembly in performance and military systems.
Power Generation: Turbines and engine components under oxidative stress.

MF Supply, Your Trusted Source for A286 Keensert® Style Key-Locking Inserts

MF Supply is a WBE/WOSB-certified supplier of A286 Keensert® style key-locking inserts, serving manufacturers, engineers, government, and industry.

We balance cost, quality, availability, and certification needs (DFARS, COC, etc.), and most popular sizes ship within 24 hours.

Browse Our Selection & Shop A286 Keenserts® Now!

Please plan ahead as less popular sizes may involve minimum order and long lead times.

Do you still have questions or would like to speak with a representative? Reach out to us or send us an RFQ below, and our MF Supply team of sourcing experts will help you find what you’re looking for. “Finding the right screw for you” is our tag line after all!

Book a one-on-one consultation with our President, Robin, to discuss how MF Supply can help you solve your Industrial Sourcing, Fastener, and Safety concerns.

Six Reasons To Buy From MF Supply

Creatively Solve Problems – We are sourcing experts and specialize in hard to find parts. We offer custom manufacturing and reworking solutions at competitive pricing, reducing long deliveries.
Functional Equivalents To Expensive Brand Names- We stock and source alternatives to brand name fasteners, reducing long lead times and saving you money.
Full eCommerce Enabled Website With Technical Manual Available 24/7 – Visit our website and Create a New Account, track online orders, browse our product catalog, check technical specs, subscribe to our blog, or buy online. We are adding items and improving functionality daily!
Same Day Shipping From The USA – Our hardware products are in stock and ship to you directly from our USA based distribution centers.
One-Stop Shopping On Certified Hardware – We stock and source a full line of fasteners including Mil-Spec, DFARS compliant and other industrial products.
WBE/WOSB Woman Owned Certified Small Business – To meet your diversity & set-aside needs.

MF Supply is a WBE/WOSB certified supply chain partner to business, industry and government. We are sourcing experts and stocking distributors of Hardware, Precision & Mil-Spec Fasteners and Safety supplies, with an expertise in inserts, military fasteners and stainless steel hardware. For more than 50 years, we have been supplying manufacturers in the electronics, industrial, commercial, aerospace and military markets with the full range of fastener products and services. Our Cage Code is 58QG4 and our registered name is RL Supply Inc dba MF Supply.

Why Use Nitronic Keenserts vs. Nitronic Helicoils?

Posted: July 29, 2025 | Author: mfsupplyblog | Filed under: Brand equivalents, Fasteners, keensert, key-locking inserts, Nitronic 60 Keenserts, Threaded Bushing, Threaded Fasteners, Threaded Inserts | Tags: Inserts, inserts for manufacturers, Keenserts, Key-Locking Inserts, manufacturing, Mil-Spec Nitronic Keenserts, Nitroinc, Nitronic 60, Nitronic 60 Keenserts, Nitronic Keenserts, Nitronic Keylocking Inserts, threaded bushing, threaded fastener | Leave a comment

If you need Nitronic material for your thread repair or thread reinforcement project, you might be deciding between helical and/or key-locking inserts. Here are some considerations to help you evaluate which product will best solve for your needs.

But first, let’s take a closer look at Nitronic 60…

What Makes Nitronic Special?

Nitronic 60, the most commonly used Nitronic material used to manufacture inserts, is a high-performance stainless steel alloy enriched with nitrogen, renowned for its exceptional wear, galling, and corrosion resistance. It provides exceptional resistance to crevice corrosion, general corrosion and high temperature oxidation, This makes it ideal for applications that require durable and reliable thread repair or reinforcement in marine environments, chemical processing equipment, and assemblies that require frequent disassembly.

Nitronic Keenserts® vs. Helicoils

Helicoils (helical inserts) are used for thread repair and reinforcement. They are considered the simplest way to repair stripped or damaged threads. Helical wire inserts are the way to go when reducing costs and minimizing space are priorities. Helicals are useful for creating permanent strong threads in softer materials, in lower heat and lower torque environments, or to convert threads between inch and metric sizes.

So what’s the the catch?

Helicals have certain limitations that Keenserts® (key-locking inserts) overcome. Keenserts are the best bet in heavy wear, high vibration and high heat situations where saving space is not a concern and the hole depth is limited.

If your project calls for Nitronic inserts, below are four reasons why you should consider choosing Keensert® style key-locking inserts vs. Nitronic helical inserts:

Superior Strength and Stability: Nitronic key-locking inserts have locking keys that mechanically lock the insert into place, offering superior resistance to vibration and torque-out compared to helical inserts, which rely solely on friction.
Enhanced Durability: The durable design of key-locking inserts provides greater resistance against thread stripping and wear, making them suitable for repeated assembly and disassembly without compromising the integrity of the threads.
Corrosion and Galling Resistance: Both helical inserts and key-locking inserts made from Nitronic 60 offer excellent corrosion resistance. However, key-locking inserts provide additional structural integrity, especially crucial in harsh environments where component failure is not an option.
Easier Installation and Maintenance: Nitronic key-locking inserts require no special taps or tools for installation beyond standard equipment—a pneumatic power tool is recommended if installing key-locking inserts in the thousands—reducing downtime during maintenance or initial assembly. Their solid, one-piece design simplifies handling and reduces the likelihood of installation errors.

Unsure which Nitronic 60 insert is ideal for your next thread-repair or reinforcement project? Send us your questions, we’re here to help!

Shop Nitronic Keensert® Style Key-Locking Inserts at MF Supply!

Nitronic Keenserts® Series and Standards Available

In addition to the previous reasons, Nitronic Keenserts® style key-locking inserts are also available in a variety of specialized styles/series and standards that are tailored for specific applications:

Miniature (KNC): Ideal for lightweight applications where space and weight constraints are critical, such as electronics or avionics. Available inch/imperial and Mil-Spec sizes run from 2-52 through 1/4-20 inches.
Thin Wall (KN & KNM): Excellent for limited-space installations, providing strength without adding significant bulk, commonly used in precision engineering. Available inch/imperial and Mil-Spec sizes run from 10-24 through 1/2-20 inches, and metric sizes run from M5 through M12.
Heavy-Duty (KNH & KNHM): Designed for high-stress applications where structural integrity and robust fastening capabilities are essential, such as automotive and heavy machinery. Available inch/imperial and Mil-Spec sizes run from 1-8 through 7/8-14 inches, and metric sizes run from M4 through M24.
Extra Heavy-Duty (KNHXH): Engineered for extreme load-bearing and high-torque scenarios, perfect for heavy industrial and military applications demanding maximum strength and durability. Available inch/imperial and Mil-Spec sizes run from 1-8 through 7/8-14 inches.

Nitronic Keenserts® style key-locking inserts can also follow/meet stringent aerospace and military standards, including:

MS51830, MS51831, MS51832, NAS1394, and NAS1395.

These styles/series and standards provide adequate solutions ranging from lightweight applications in aerospace to heavy-duty industrial settings.

Industries That Benefit From Nitronic Keenserts®

Nitronic Keensert® style key-locking inserts are ideal for industries that demand trusted and dependable reliability, such as:

Aerospace: Nitronic key-locking inserts are essential for structural components requiring exceptional strength and resistance to vibration.
Marine: Nitronic key-locking inserts are able to withstand harsh saltwater environments without corrosion.
Automotive and Defense: Nitronic key-locking inserts are ideal for parts undergoing frequent assembly and disassembly.
Chemical Processing: Nitronic key-locking inserts are extremely resilient under highly corrosive conditions.

MF Supply, Your Trusted Source for Nitronic Keensert® Style Key-Locking Inserts

MF Supply is a WBE/WOSB certified business, and a leading supplier of Nitronic Keensert® style key-locking inserts for manufacturers, engineers, government and industry. At MF Supply, we understand the industry’s need to balance cost, quality, availability, and paperwork/certification requirements—DFARS, COC, and more. Most of our popular Nitronic key-locking inserts sizes are in stock and ready to ship within 24 hours.

Buy Nitronic Keensert® Style Key-Locking Inserts From MF Supply!

Book a one-on-one consultation with our President, Robin, to discuss how MF Supply can help you solve your Industrial Sourcing, Fastener, and Safety concerns.

Six Reasons To Buy From MF Supply

Creatively Solve Problems – We are sourcing experts and specialize in hard to find parts. We offer custom manufacturing and reworking solutions at competitive pricing, reducing long deliveries.
Functional Equivalents To Expensive Brand Names- We stock and source alternatives to brand name fasteners, reducing long lead times and saving you money.
Full eCommerce Enabled Website With Technical Manual Available 24/7 – Visit our website and Create a New Account, track online orders, browse our product catalog, check technical specs, subscribe to our blog, or buy online. We are adding items and improving functionality daily!
Same Day Shipping From The USA – Our hardware products are in stock and ship to you directly from our USA based distribution centers.
One-Stop Shopping On Certified Hardware – We stock and source a full line of fasteners including Mil-Spec, DFARS compliant and other industrial products.
WBE/WOSB Woman Owned Certified Small Business – To meet your diversity & set-aside needs.

MF Supply is a WBE/WOSB certified supply chain partner to business, industry and government. We are sourcing experts and stocking distributors of Hardware, Precision & Mil-Spec Fasteners and Safety supplies, with an expertise in inserts, military fasteners and stainless steel hardware. For more than 50 years, we have been supplying manufacturers in the electronics, industrial, commercial, aerospace and military markets with the full range of fastener products and services. Our Cage Code is 58QG4 and our registered name is RL Supply Inc dba MF Supply.

Floating Keensert® Style Key-Locking Inserts — Ideal for Off-Center Holes

Posted: July 2, 2025 | Author: mfsupplyblog | Filed under: Brand equivalents, Fasteners, Floating Keenserts, floating key-locking inserts, keensert, key-locking inserts, Threaded Bushing, Threaded Fasteners | Tags: Alloy Steel Floating Keenserts, Floating Inserts, Floating Keenserts, Floating Keenserts Distributor, Floating Keenserts Supplier, Floating Key Locking Inserts, Floating Keylocking Inserts, inch keenserts, Inserts, inserts for manufacturers, Keenserts, manufacturing, Stainless Steel Floating Keenserts, threaded bushing, threaded fastener | Leave a comment

MF Supply is an expert and a leading supplier of Floating Key-Locking Inserts—commonly known in the industry as Floating Keenserts®, Floating Key Locking Threaded Inserts, Floating Key Locking Inserts, and Floating Keylocking Inserts—for manufacturers, engineers, government and industry.

Shop Floating Keensert® Style Key-Locking Inserts at MF Supply!

In this blog, we will showcase a comprehensive overview of what Floating Keenserts® are, their benefits, where they are used, available styles, sizes, and materials—and when they’re the go-to solution for aerospace, defense, or demanding industrial manufacturing applications.

What Is a Floating Keensert®?

A Floating Keensert® is a specialized fastener engineered to correct and accommodate thread misalignments. The Keensert®, supplied as a one-piece unit, is ideal for use where mating panel holes may be off-center. Unlike the conventional rigid Keensert®, a Floating Keensert® integrates an internal floating nut element that “floats” within the insert’s outer housing. This unique floating feature allows internal threads to self-align during installation, reducing the risk of binding or misfit issues, which can occur with other Keenserts® or conventional threaded inserts.

This insert automatically compensates for misalignment:

.015” for miniature size 2-56
Up to .040” for heavy-duty size #10 and larger

In What Series, Sizes and Materials are Floating Keenserts® Available?

Floating Keenserts® are available in Miniature and Heavy Duty series—both in locking and non-locking options. Standard sizes and materials are noted below. Special materials, such as A286 Stainless Steel, may be available as a special order and may involve a lead time or a minimum.

Miniature Floating Keenserts® Series (KNK & KNKL)

Sizes: Available in inch/imperial sizes ranging from 2-56 through 8-32 inches.
Material: Crafted from 303 corrosion resistant stainless steel (CRES).
Finish: Passivated.
Keys: These inserts are furnished with two locking keys only.
Tolerances: ±.010 inch unless specified otherwise.

Heavy Duty Floating Keenserts® Series (KNK, KNKD & KNKDL):

Sizes: Available in inch/imperial sizes ranging from 10-24 through 1/2-20 inches.
Material: Made from durable 4140 Alloy Steel.
Finish: Cadmium Plating.
Keys: These inserts are furnished with four locking keys for internal thread size of 5/16 and larger, and two locking keys for all smaller sizes.
Tolerances: ±.010 inch unless specified otherwise.

Locking and Non-Locking Features

Both, Miniature and Heavy Duty Floating Keenserts® feature self-locking options/variants, which are always denoted by an “L” in the series or product codes (e.g., KNKL0256J, KNKL, and KNKDL). These self-locking inserts are also treated with dry-film lubricant, which usually appear darker in finish than non-locking models, simplifying installation and providing amazing thread-locking capabilities.

Check out our Floating Keensert® Style Key-Locking Inserts cross-reference chart to find your ideal insert!

What Are the Benefits and Possible Applications for Floating Keenserts®?

Floating Keenserts® provide significant benefits by automatically compensating for thread misalignment, facilitating easier and more accurate fastener installations, and enhancing reliability in scenarios where standard rigid inserts could lead to thread binding, misalignment, or failure. Typical applications include:

Curved surfaces where precise alignment is challenging
Flat head screw/bolt installations
Assemblies involving multiple hole alignments
Environments subject to thermal expansion and contraction

Their one-piece assembly design ensures easy installation and optimal thread alignment, minimizing downtime and improving overall project reliability.

MF Supply Is Your Source for Floating Keensert® Style Key-Locking Inserts!

MF Supply is a WBE/WOSB certified business, and a leading supplier of Floating Keensert® Style Key-Locking Inserts for manufacturers, engineers, government and industry. At MF Supply, we understand the dynamic needs of the industry, including the balance of price, quality, availability and certification paperwork, such as DFAR and COC. Most popular sizes are in stock and ready to ship within 24 hours. Ready to see how we can help you?

Browse through our catalog of Floating Keensert® Style Key-Locking Inserts and discover the perfect inserts for your next project!

Book a one-on-one consultation with our President, Robin, to discuss how MF Supply can help you solve your Industrial Sourcing, Fastener, and Safety concerns.

Six Reasons To Buy From MF Supply

Creatively Solve Problems – We are sourcing experts and specialize in hard to find parts. We offer custom manufacturing and reworking solutions at competitive pricing, reducing long deliveries.
Functional Equivalents To Expensive Brand Names- We stock and source alternatives to brand name fasteners, reducing long lead times and saving you money.
Full eCommerce Enabled Website With Technical Manual Available 24/7 – Visit our website and Create a New Account, track online orders, browse our product catalog, check technical specs, subscribe to our blog, or buy online. We are adding items and improving functionality daily!
Same Day Shipping From The USA – Our hardware products are in stock and ship to you directly from our USA based distribution centers.
One-Stop Shopping On Certified Hardware – We stock and source a full line of fasteners including Mil-Spec, DFARS compliant and other industrial products.
WBE/WOSB Woman Owned Certified Small Business – To meet your diversity & set-aside needs.

MF Supply is a WBE/WOSB certified supply chain partner to business, industry and government. We are sourcing experts and stocking distributors of Hardware, Precision & Mil-Spec Fasteners and Safety supplies, with an expertise in inserts, military fasteners and stainless steel hardware. For more than 50 years, we have been supplying manufacturers in the electronics, industrial, commercial, aerospace and military markets with the full range of fastener products and services. Our Cage Code is 58QG4 and our registered name is RL Supply Inc dba MF Supply.

Ultimate Guide: Inch, Mil-Spec, and Metric Keensert® Equivalent Cross Reference Guide!

Posted: April 12, 2024 | Author: mfsupplyblog | Filed under: Alloy Keenserts, Carbon Steel Keenserts, Cross Reference Charts, Inch and Mil-Spec Keensert, keensert, key-locking inserts, Metric Keensert, Stainless Steel Keenserts | Tags: Hardware, Imperial Keenserts, Keensert Cross Reference Charts, Keenserts, Keenserts Cross Reference, Key-locking Inserts Cross Reference, Keylocking Inserts Cross Reference, manufacturing, metric keenserts, mil-spec keenserts, MS51830, ms51831, MS51832, Precision Engineering, Precision Manufacturers, threaded inserts | Leave a comment

At MF Supply, we spend a lot of time sourcing hard to find, back ordered, expensive, or out-of-stock OEM hardware brands. We do this in order to save money and to reduce long lead times for our customers, without sacrificing quality. In fact, you can find hundreds of registered trademark-branded fasteners and components in the industrial marketplace. Much like brand-name pharmaceuticals such as Tylenol and Advil are available generically as acetaminophen and ibuprofen, some brand name fasteners are also available as “generics,” “crosses,” “alternatives” or “functional equivalents.”

In the world of fasteners, a functional equivalent fastener is a part that is the same as the brand-name product in form, fit and function, including material and plating specifications, but is made by an alternative manufacturer.

Is There an Available Functional Equivalent to My OEM Brand?

Below, find a sample list of brands that have generic alternatives:

3 STAR RIVETS USA, ABBATRON®, ALCOA, AMATOM®, APEX®, ARCONIC®, ATLAS®, AVDEL®, AVK®, B. F. GOODRICH, BOLLHOFF, BUCKEYE, CAPTIVE, CELUS®, CHERRY®, CONCORD, FASTENAL, GESIPA®, GRIPCO®, GLOBE ELECTRONICS, H. H. SMITH, HUCK, INDUX, INTERFAST, KEENSERT®, KEYSTONE, LOCTITE®, LYN-TRON, MACLEANESNA®, MARSON®, MCMASTER-CARR, MISUMI, MSC INDUSTRIAL, PEM®, PIC DESIGN®, POP®, POWERS®, QUICKSCREWS, RAF, RED HEAD®, ROTOR CLIP®, SHEREX, SIMPSON, SOUTHCO®, SPS TECHNOLOGIES, TINNERMAN®, U. S. ANCHOR. VIP, W. M. BERG, W. W. GRAINGER, WALDES TRUARC®.

Do Keenserts® Have Functional Equivalents?

One example of an OEM hardware brand is the trademarked names Keensert®and Keysert®. Although the name Keensert® is often used to describe a Key-locking insert — like Band-Aid® is used to describe an adhesive bandage, or like Kleenex® is used to describe facial tissues — Keensert® is the registered trademark of Huck Patents; its close cousin, the Keysert®, is a registered trademark of Alcoa Fastening Systems.

The same key-locking inserts manufactured under the Keensert® and Keysert® brand names are also available (or have been available in the past, prior to industry consolidation) from alternative manufacturers under brand names such as Acme, Camloc, Clarendon, Fairchild, Kaynar, Microdot, Rexnord and Tridair. You may also find Keenserts® under their Mil-Spec numbers, which include MS51830, MS51831, MS51832 and NA series. Keenserts® come in imperial, metric and mil-spec sizes and materials.

Below, checkout our three most popular key-locking insert cross reference charts, to see if there is a functional equivalent to the Keensert® you need.

Keensert® Equivalent Cross Reference Charts: Find OEM Brands, Mil-spec & Functional Equivalents

Mil-Spec & Inch Keensert® Style Keylocking Inserts Cross Reference Chart – MS51830 | MS51831 | MS51832

Miniature, Thinwall & Lightweight, Heavy Duty, Extra Heavy Duty, Key-locking Inserts in Stainless Steel, A286, 4140 Alloy. Includes MS51830, MS51831, MS51832, NAS1394, NAS1395, KN, KNC, KNH, KNHX, KNL & KNCL Series.

Metric Keensert® Cross Reference Chart – 4140 Alloy | A286

Miniature, Thinwall & Lightweight, Heavy Duty, Key-locking Inserts in A286 and 4140 Alloy. Includes NA0146, NA0147, NA0148, NA0149, NA0150, NA0151, KN, KNC, KNL & KNCL Series.

Metric Keensert® Cross Reference Chart – Stainless Steel

Miniature, Thinwall & Lightweight, Heavy Duty, Keylocking Inserts in Stainless Steel, KN, KNC, KNL & KNCL Series.

Keensert® Style Key-Locking Inserts at MF Supply

MF Supply is a leading supplier of Keensert® style key-locking inserts including major brands and equivalents. We stock a huge inventory including Miniature, Thinwall, Lightweight, Heavy Duty, Extra Heavy Duty, Locking, Non-Locking, Solid and Floating style Keenserts®. Our Mil-Spec products are DFAR compliant with COC and full certifications available upon request.

Manufacturers working with us can expect timely deliveries, competitive pricing, and access to expert guidance to help optimize their fastener choices. Manufacturers eager to explore our product catalog, including our recently expanded product categories, are encouraged to visit our website at www.mfsupply.com, reach out to us at sales@mfsupply.com or request a quote. Our MF Supply team of sourcing experts will help find what you need. “Finding the right screw for you” is our tag line after all!

Book a one-on-one consultation with our President, Robin, to discuss how MF Supply can help you solve your Industrial Sourcing, Fastener, and Safety concerns.

Your Purchasing Department’s Secret Weapon!
Here are 5 reasons to buy from MF Supply

We Source and Deliver What Others Can’t, Faster Than You Imagined – With speedy solutions for elusive parts and lengthy delivery times – We’ve got you covered with both custom-made specials (send us your prints!) and hard-to-source options, quickly and at a fair price.
Cost-Effective Functional Equivalents to OEM Brand Fasteners-Why Pay More? – Reduce lead times and costs with the same quality and same performance. Try us for alternatives to brands like McMaster-Carr, MSC, Misumi, PEM, and RAF and experience unmatched savings! Same form, fit and function for less.
Huge Selection of Certified and Commercial Hardware with Same-day Shipping Available for Countless Items – We source and stock standards, specials, commercial, Mil-Spec & OEM brands in inch and metric sizes. Standards include AN, NAS, MS, IFI, ASTM, ASME, DIN, ISO, JIS. We are sourcing experts for inserts, certified Mil-Spec parts and anything in stainless steel. Many parts are available with manufacturers’ certifications, including DFAR, ROHS and CoC. Trust us to ship on-time from our national distribution centers.
A User-Friendly, 24/7 Online Shopping Experience – Enjoy a 24/7 online shopping experience with easy-to-use filters, detailed product information, and a constantly updated technical directory. Sign up now for a seamless experience!
WBE/WOSB Certified Woman-Owned Small Business – As a certified Woman-Owned Small Business, we support your diversity goals. Trust us to meet your fastener and sourcing needs with expertise and efficiency [Cage Code 58QG4].

Carbon Steel Key-Locking Inserts (AKA Keenserts®) at www.mfsupply.com

Posted: January 26, 2024 | Author: mfsupplyblog | Filed under: Brand equivalents, Carbon Steel Keenserts, Fasteners, Inch and Mil-Spec Keensert, keensert, key-locking inserts, Metric Keensert, Threaded Bushing, Threaded Fasteners | Tags: Carbon Steel, Carbon Steel Keenserts, Carbon Steel Key-Locking Insesrts, Fasteners, inch keenserts, Inserts, inserts for manufacturers, Keenserts, manufacturing, metric keenserts, mil-spec keenserts, RKK, RKK Keenserts, threaded bushing, threaded fastener | Leave a comment

MF Supply is an expert and industry leader when it comes to key-locking inserts, commonly known by the popular brand name Keensert®. We stock and source key-locking inserts in a wide variety of materials, platings and sizes, including Inch, Metric, Commercial and Mil-Spec options.

In today’s blog, we will showcase a comprehensive overview of Carbon Steel Key-Locking Inserts, covering their benefits, uses, styles, standards, sizes, and comparison with other key-locking inserts made from other materials — so you are all set before jumping off to procure them for your next project.

What are Carbon Steel Key-Locking Inserts?

Carbon Steel Key-Locking Inserts, often referred to in industry vernacular as Carbon Steel Keenserts®, are precision-engineered threaded inserts predominantly fabricated from high-grade carbon steel.

Featuring both internal and external threads, these inserts are adept at providing wear-resistant thread interfaces in substrates that are inherently susceptible to thread degradation or are insufficiently robust for the intended mechanical loads. The external threading of these inserts exhibits a larger diameter and pitch compared to the internal threads, ensuring a secure engagement with the parent material.

These components are specifically designed for thread reinforcement and repair applications across a broad spectrum of parent materials. Their key-locking mechanism involves the deployment of keys integrated into the insert body. Upon installation into a pre-tapped hole, these keys are driven outward into the parent material, thereby affording a secure mechanical lock that resists rotational and axial forces. Hence, this feature is pivotal in applications where vibrational loads or cyclic stresses are prevalent.

The versatility of Carbon Steel Key-Locking Inserts makes them beneficial for any sector requiring durable, reliable threaded connections, especially where materials are subject to wear, high stress, or require thread repair and reinforcement.

What Styles, Standards & Sizes Are Available?

Carbon Steel Keenserts®, or Key-Locking Inserts, have different styles in order to cater to a wide range of application requirements and material conditions. The distinct styles are designed to address specific challenges such as load capacity, space constraints, installation requirements, and the physical properties of the base material. Below is a list of all the styles available for these Key-Locking Inserts:

Thin Wall | RKKA | KNM: These are used when minimal space is available or in applications where less material needs to be removed. They offer a good balance between strength and size. Available off the shelf in Internal Thread 10-24 through 1/2-20 and Metric M5-M12. Often referred to by their original Fairchild part numbers: RKKA
Heavy Duty | RKK | KNHM: Designed for higher strength and durability, these are suitable for applications subject to high stress or where a stronger thread is required. Available off the shelf in Internal Thread 8-32 through 1-1/2, and Metric M4-M24. Often referred to by their original Fairchild part numbers: RKK
Extra Heavy Duty | KNHXH: These inserts are used in extremely demanding applications where very high pull-out and torque resistance is needed. Available off the shelf in Internal Thread 6-32 through 1-12. No standard Metric option available. Often referred to by their original Fairchild part numbers: KNHXH
Solid | KNJ: Unlike other types have both internal and external thread, solid inserts have only external thread. Once installed, they can be drilled and tapped as required. These solid inserts can be used to relocate misplaced holes, customize the internal threads, or plug existing holes. They are extremely durable but might require more installation space. Available off the shelf in External Thread 3/8-16 through 1-1/4 and Metric M8-M32. Often referred to by their original Fairchild part numbers: KNJ.

Commonly available in diameters from 6-32 through 1-1/2, Carbon Steel Key-Locking Inserts can be used in a wide range of applications from small electronics to heavy machinery. The thread pitch varies accordingly, with finer pitches for delicate applications and coarser pitches for heavy-duty applications.

Carbon Steel Key-locking inserts are generally offered as commercial parts, and don’t have a Mil-Spec equivalent. They come standard with a phosphate finish.

*Note – Carbon Steel Key-locking Inserts do not come with a Self-Locking option, which is a standard option with Stainless Steel Keenserts®.

The Carbon Steel Difference!

How do Carbon Steel Key-Locking Inserts stack up against other materials? Here’s the breakdown:

Stainless Steel: Stainless Steel Keenserts® are known for their corrosion resistance, especially in marine and chemical environments. However, Carbon Steel Key-Locking Inserts are generally stronger and more wear-resistant, which is beneficial in applications where the primary concern is strength rather than exposure to corrosive elements.
4140 Alloy Steel: This is a high-carbon alloy steel that provides excellent wear resistance and strength. While 440 Alloy Steel Keenserts® offer superior hardness, Carbon Steel Key-Locking Inserts typically excel in toughness and are more ductile, making them less likely to crack under high stress.
A286: A286 is an iron-nickel-chromium stainless steel alloy known for its high strength and corrosion resistance at elevated temperatures. Carbon Steel Key-Locking Inserts may not match the high-temperature performance but are significantly more cost-effective for applications where extreme temperatures are not a concern.
Nitronic 60: This material provides excellent galling and wear resistance. While it is superior in environments where these factors are critical, Carbon Steel Key-Locking Inserts offer a better balance of strength and cost-efficiency for general-purpose use.
Inconel: Known for its ability to withstand extreme temperatures and corrosion, Inconel is often used in high-temperature applications. Carbon Steel Key-Locking Inserts, on the other hand, are more widely used in applications where high temperature and corrosion are not as critical but where high strength and lower cost are important.

Hence, Carbon Steel Key-Locking Inserts offer an excellent balance of performance and value, making them a preferred choice for applications where the benefits of higher-cost, specialized materials are not required. They stand out for their strength, toughness, and cost-effectiveness, providing a reliable and affordable solution for thread reinforcement and repair.

Carbon Steel Key-Locking Inserts at MF Supply!

MF Supply is a WBE/WOSB certified business, and a leading supplier of Carbon Steel Key-locking Inserts (AKA Keenserts®) for manufacturers, government and industry. At MF Supply, we understand the dynamic needs of the industry, including the balance of price, quality, availability and certification paperwork. Ready to see how we can help you make a difference?

Visit our website or browse through the links provided below to discover the perfect Carbon Steel Key-Locking Inserts for your next project!

Inch Carbon Steel Key-locking Inserts:

Metric Carbon Steel Key-locking Inserts:

Note – Installation requires a drill bit, a standard tap, an installation tool, and a hammer. Feel free to ask us about Keensert® Kits available for many Carbon Steel sizes. Kits include a minimum of 2 inserts, a drill bit, a tap and an installation tool.

Do you still have questions or would like to speak with a representative? Reach out to us, and our MF Supply team of sourcing experts will help you find what you’re looking for. “The right screw for you” is our tag line after all!

Book a one-on-one consultation with our President, Robin, to discuss how MF Supply can help you solve your Industrial Sourcing, Fastener, and Safety concerns.

Six Reasons To Buy From MF Supply

Creatively Solve Problems – We are sourcing experts and specialize in hard to find parts. We offer custom manufacturing and reworking solutions at competitive pricing, reducing long deliveries.
Functional Equivalents To Expensive Brand Names- We stock and source alternatives to brand name fasteners, reducing long lead times and saving you money.
Full eCommerce Enabled Website With Technical Manual Available 24/7 – Visit our website and Create a New Account, track online orders, browse our product catalog, check technical specs, subscribe to our blog, or buy online. We are adding items and improving functionality daily!
Same Day Shipping From The USA – Our hardware products are in stock and ship to you directly from our USA based distribution centers.
One-Stop Shopping On Certified Hardware – We stock and source a full line of fasteners including Mil-Spec, DFARS compliant and other industrial products.
WBE/WOSB Woman Owned Certified Small Business – To meet your diversity & set-aside needs.

MF Supply is a WBE/WOSB certified supply chain partner to business, industry and government. We are sourcing experts and stocking distributors of Hardware, Precision & Mil-Spec Fasteners and Safety supplies, with an expertise in inserts, military fasteners and stainless steel hardware. For more than 50 years, we have been supplying manufacturers in the electronics, industrial, commercial, aerospace and military markets with the full range of fastener products and services. Our Cage Code is 58QG4 and our registered name is RL Supply Inc dba MF Supply.

Inch & Metric Nitronic Keenserts® Now Available at www.mfsupply.com!

Posted: November 15, 2023 | Author: mfsupplyblog | Filed under: Brand equivalents, Fasteners, Inch and Mil-Spec Keensert, keensert, key-locking inserts, Metric Keensert, Nitronic 60 Keenserts, Threaded Bushing, Threaded Fasteners | Tags: Fasteners, inch keenserts, Inserts, inserts for manufacturers, Keenserts, manufacturing, Mechanical Fasteners, metric keenserts, Mil-spec fasteners, mil-spec keenserts, Nitronic 60, Nitronic 60 Keensesrts, Nitronic Keenserts, threaded bushing, threaded fastener | Leave a comment

In the bustling world of manufacturing and engineering, where every component counts and the margin for error is slim, MF Supply recognizes the intricacy involved in sourcing materials that offer both superior performance and extended durability. This is where our friends, the Key-locking Inserts (AKA Keenserts®) become the stars of the show. Today, we’re turning the spotlight on an insert that’s been making waves in the industry: the Nitronic 60 Key-locking Insert!

If you’re on the quest for Key-locking Inserts that promise to elevate the integrity of your projects, you’re in the right place. Nitronic 60 key-locking Inserts are not just components; they’re your peace of mind molded into high-performance alloy.

Why Nitronic 60 Key-locking Inserts? The Vanguard of Resilience

Picture a material that laughs in the face of wear, shrugs off corrosion, and doesn’t flinch under high torque. That’s Nitronic 60 for you — an alloy steel that’s as tough as they come. Crafted from this robust alloy, Nitronic Key-locking Inserts boast unparalleled wear and galling resistance. For those of you constantly battling the wear and tear that comes with mechanical demands, these threaded inserts are your knights in shining armor. Think of them as the silent guardians against the everyday wear-and-tear that can compromise your work.

The Rust Doesn’t Sleep, But You Can

Corrosion is the arch-nemesis of metal, lurking and waiting to undermine your structures. But with Nitronic 60’s exceptional corrosion resistance, rest easy knowing that your components are as steadfast as your ambition. Whether it’s the salty bath of marine environments or the demanding conditions of chemical processing, they’ve got you covered.

Strength That Speaks Volumes

Nitronic 60 Key-locking Inserts don’t just resist wear; they embrace strength. High stress, high torque — bring it on! The formidable might of Nitronic 60 makes these Key-locking Inserts the backbone for applications that can’t afford to falter, from the aerospace zeniths to the depths of automotive innovation.

The Nitronic 60 Difference

We hear you asking, “But how do they stack up against other materials?” Here’s the deal:

Nitronic 60, as a material, is a high-performance stainless steel alloy known for its excellent strength and resistance to wear and galling. This versatile alloy provides exceptional resistance to high temperature oxidation, crevice corrosion and general corrosion, making it well suited to marine and chemical applications. Key-locking inserts made from Nitronic 60 are used in various applications where high strength and corrosion resistance are a must.

Carbon Steel Inserts: Compared to standard steel, Nitronic 60 offers superior resistance to corrosion and galling.
Stainless Steel Inserts: Among stainless steels, Nitronic 60 typically outperforms varieties such as 304 or 316 in wear resistance.
Inconel Inserts: Inconel excels in high-temperature applications but comes at a higher cost and greater machining difficulty than Nitronic 60.
4140 Alloy Inserts: 4140 Alloy provides greater tensile strength and enhanced performance at high temperatures, although it falls short in corrosion resistance and often necessitates protective coatings. Nitronic 60 is better suited for applications involving friction at moderate temperatures.
A286 Inserts: A286 excels in high-temperature applications, maintaining higher strength at elevated temperatures, though it’s tougher to machine and more expensive than Nitronic 60.

A Spectrum of Possibilities

We’re not about “one-size-fits-all” because we know your engineering needs are as unique as your blueprints. That’s why we offer Key-locking Inserts in inch, mil-spec and metric sizes that are tailored to the scope and scale of your vision — common internal diameters include #2-56 through 1 1/2-6 for inch & mil-spec sizes, and M2 through M24 for metric sizes. And with varying lengths at your disposal, the only limit is the application and your imagination. Materials

Compliance with stringent industry standards is not just a promise; it’s our practice. Our inserts meet or exceed critical aerospace and military specifications, ensuring that they deliver in applications where there is no room for error. Standards available include MS51830, MS51831, MS51832, NAS1394 and NAS1395. Series available include Miniature KNC, Thin Wall KN & KNM, heavy-duty KNH & KNHM, and extra heavy-duty series KNHXH.

Whether you’re in aerospace, automotive, defense, or any field that demands unyielding materials, these inserts are ready to serve. They’re the go-to for applications that require repeated assembly and disassembly, ensuring longevity and reliability every step of the way.

Discover More, Achieve More

MF Supply is a WBE/WOSB certified business, and a trusted supplier of Nitronic 60 Key-locking Inserts (AKA Keenserts®) for manufacturers, government and industry. Eager to delve deeper into the world of Nitronic 60 Key-locking Inserts? Visit our website, where innovation is just a click away, and join the ranks of manufacturers and engineers who don’t just build, but inspire.

With Nitronic 60 Key-locking Inserts, it’s not just about holding things together; it’s about unlocking possibilities. Discover the sizes, standards, and the success that our inserts can enable.

Inch & Mil-Spec Nitronic 60 Key-locking Inserts

Metric Nitronic 60 Key-locking Inserts

Do you still have questions or would like to speak with a representative? Reach out to us, and our MF Supply team of sourcing experts will help you find what you’re looking for. “Finding the right screw for you” is our tag line after all!

Book a one-on-one consultation with our President, Robin, to discuss how MF Supply can help you solve your Industrial Sourcing, Fastener, and Safety concerns.

Six Reasons To Buy From MF Supply

Full eCommerce Enabled Website With Technical Manual Available 24/7 – Visit our website and Create a New Account, track online orders, browse our product catalog, check technical specs, subscribe to our blog, or buy online. We are adding items and improving functionality daily!
Same Day Shipping From The USA – Our hardware products are in stock and ship to you directly from our USA based distribution centers.
Functional Equivalents To Expensive Brand Names- We stock and source alternatives to brand name fasteners, reducing long lead times and saving you money.
Creatively Solve Problems – We are sourcing experts and specialize in hard to find parts. We offer custom manufacturing and reworking solutions at competitive pricing, reducing long deliveries.
One-Stop Shopping On Certified Hardware – We stock and source a full line of fasteners including Mil-Spec, DFARS compliant and other industrial products.
WBE/WOSB Woman Owned Certified Small Business – To meet your diversity & set-aside needs.

“Heli-coils®” vs. “Keenserts®”: 3 differences you must know-Part 2 of 2

Posted: September 21, 2023 | Author: mfsupplyblog | Filed under: Brand equivalents, Functional Equivalent, Helical, helical wire inserts, keensert, key-locking inserts, Wire Inserts | Tags: heli-coil, helical wire insert, helical wire threaded insert, helicoil, inserts for manufacturers, keensert, key-locking insert, key-locking threaded insert, mil-spec heli-coils, mil-spec keenserts, mil-spec threaded inserts, threaded bushing, threaded fastener, threaded insert, Threaded inserts for manufacturers | Leave a comment

Welcome back to the second part of, “Heli-coils®” vs. “Keenserts®”: 3 differences you must know. As a refresher, both Helical Wire Inserts (AKA Heli-coils®) & Key-locking Inserts (AKA Keenserts®) are popular threaded inserts that are commonly used in precision manufacturing, transportation, and aerospace applications. Their uses overlap range from restoring/repairing stripped threaded holes, strengthening threaded holes in metals and other soft materials, providing high resistance to torque-out and pull-out, & to place threaded holes on materials too thin to accept them. The three main differences between Wire Inserts and Key-Locking Inserts lie in their strength, ease of installation & price. Today we will continue on from where we left of on our previous blog, and discuss about OEM brands, Mil-spec options, and how to order them!

Threaded Inserts’ Brands & Equivalents

A Helical Wire Insert, commonly known as “threaded wire insert,” is essentially a coil-wire made of stainless steel or other materials which, when installed, provide a new threaded hole surface. One of the most recognized brands for helical inserts is “Heli-Coil®,” but there are several others as well, including E-Z Lok, Bollhoff, Recoil, KATO, Perma-Coil, V-Coil and Time-Sert. Below is a list of some of the most well known brands for this category:

Heli-Coil®: Part of the Stanley Engineered Fastening brand, Heli-coil’s name is nearly synonymous with threaded wire inserts, and Heli-coil®is a registered trademark of Emhart® Teknologies, Inc.
Recoil®: Part of Howmet’s (previously Arconic, formerly Alcoa Fastening Systems) wire thread insert offering. Recoil offers helical wire inserts in bulk, replacement packets, kits and associated tools, taps and drill bits.
E-Z Lok®: Offering Wire Inserts under the E-Z Coil™ Helical Coil Insert brand, specializing in industrial and automotive .
KATO®: The Original Inventor & Manufacturer of the Bi-Directional Tangless Insert.

A Key-locking Threaded Insert, commonly known by the popular brand name “Keensert® and Keysert®,” is a solid bushing style threaded insert with unique external keys that get hammered into grooves through the threads—permanently locking the insert in place. Key-locking inserts are specifically designed for high-stress applications where strong, permanent threads are essential. Key-locking inserts offer exceptional resistance to vibration, torque-out and pull-out, making them suitable for critical components and assemblies that require a secure, immovable joint, or in scenarios where frequent assembly and disassembly might weaken the primary thread strength of the base material. While “Keensert®” is a trademarked name, tens of manufacturers and brands offer similar products in the solid threaded insert category including Acme, Camloc, Chrislynn, Clarendon, Fairchild, Loksert, Kaynar, Microdot and Tridair brands. Here is a list of the most popular brands:

Keensert®: is a registered trademark of Huck Patents, Inc. The trademark name is currently owned by the company that started it all, Howmet (formerly Arconic & Alcoa Fastening Systems).
Recoil®: The trademarked Keysert name belongs to Recoil, which is also part of the current Howmet family (formerly Arconic & Alcoa Fastening Systems).
Carr-Lane: Specializing in Tooling Components, Carr-Lane offers a large selection of Inch and Metric Key-locking inserts in steel and stainless steel.
Fairchild Fasteners®: Purchased by Arconic in 2002, Many original Fairchild part numbers are still produced and commonly used in the aerospace industry.
Acme – USA based manufacturers of inch, metric, Industrial Style and Mil-Spec key-locking inserts in a variety of materials and finishes.

Note: Various manufacturers and brands have their own designs, strengths, materials and applications for which they’re best suited. When choosing a threaded insert, it’s essential to consider factors like the material you’re working with, the stresses the insert will be under, and the expected lifecycle of the product. Industrial, automotive and aerospace industries each have their own requirements, which may include DFAR, First Article or other certifications. If you need assistance finding out what type of threaded insert is best suited for the project you’re working on, read part one of this blog, or reach out to us with your questions. MF Supply is an expert and leading supplier of Helical Wire Inserts and Key-locking Threaded Inserts—functional equivalents to top & expensive brands, such as Heli-Coil® & Keensert®.

Mil-Spec Options

Mil-spec Helical Wire Inserts (Heli-Coils®) are crafted to meet military specifications. They carry specific labels signifying their adherence to the rigorous standards established by the U.S. Department of Defense in order to guarantee that the inserts will fulfill the necessary requirements for military applications.

With that having been said, these threaded inserts often show up as free-running or self-locking inserts under their Mil-spec numbers, which can be crossed to commercial equivalents. Some common Mil-spec Helical Wire Inserts’ series include MS122076 through MS124831, MA1565, MA3276, MA3277, MA3278, MA3279, MA3280, MA3281, MA3329, MA3330, MA3331, , MS21208, MS21209, MS33537, NA0276, NAS1130

Mil-Spec key-locking threaded inserts (Keenserts®) adhere to distinct mil-spec (military specification) series. Options for these inserts include Miniature, Thinwall & Lightweight, Heavy Duty, Extra Heavy Duty, Keylocking Inserts in Stainless Steel, A286, and 4140 Alloy materials. Here are several prevalent mil-spec series associated with them: MS51830, MS51831, MS51832, NAS1394, NAS1395, NA0146, NA0147, NA0148, NA0149, NA0150, NA0151. The mil-spec parts will often have a commercial equivalent that is also known under the original Fairchild nomenclature, including the KN, KNC, KNH, KNL & KNCL Series.

Authentic Mil-spec parts will be available with documentation that confirm their compliance to the specification. Examples of certified paperwork might include a Certificate of Conformance, material traceability, DFAR statement, and chemical and/or physical tests reports.

How to Order

Now you know the differences between Helical / Heli-coils® and Key-locking / Keensert® / Keyserts®, the brands available, and the mil-spec series options.

To find the exact insert you are seeking on our website, there are currently four ways to proceed:

1. You can visit the Keenserts®, Threaded Inserts & Helical Wire Inserts category section of our website, and choose between Keenserts® for Manufacturers or Helical Wire Inserts. Once you select the desired category of products, you can then narrow down your search by selecting between metric or inch & mil-spec sizes, materials, etc.

2. You can also visit our website and enter the product standard, product number or keyword (e.g., MS51830, MS51830-101, “Keenserts,” “Helical Inserts,” etc.) in our search bar, and click the “Search” button. Once the list of available products are listed, you may use our product filters to search for the desired size, material, etc.

3. Alternatively, you could also use our newly added Product Finder tool! Select the desired Item Type, Subtype, Material, etc. And when you’re done selecting, simply click on the “Search” button, and the product finder will display a list of available products for you.

4. Lastly, you could also reach out to us or Request a Quote. Our MF Supply team of sourcing experts are here to assist you and help you find the right product(s).

Once you find the insert you need, you can request a quote or buy online.

Key-locking Inserts (Keenserts®) & Helical Wire Inserts (Heli-Coils®) at MF Supply

MF Supply is a WBE/WOSB woman owned business, and leading supplier of Keenserts® & Helical Wire Inserts including major OEM brands and brand equivalents, in imperial, metric and mil-spec sizes and materials.

We stock a huge inventory including Miniature, Thinwall, Lightweight, Heavy Duty, Extra Heavy Duty, Locking, Non-Locking, Solid and Floating style Keenserts® in a variety of sizes and materials. Our mil-spec and certified insert products are DFAR compliant with COC and full certifications available upon request.

We Invite You To Request a Quote, Download a Guide or a Line Card Today!

Do you still have questions or would like to speak with a representative to request a quote? Reach out to us, and our MF Supply team of sourcing experts will help you find what you’re looking for. “Finding the right screw for you” is our tag line after all!

Book a one-on-one consultation with our President, Robin, to discuss how MF Supply can help you solve your Industrial Sourcing, Fastener, and Safety concerns.

Six Reasons To Buy From MF Supply

Full eCommerce Enabled Website With Technical Manual Available 24/7 – Visit our website and Create a New Account, track online orders, browse our product catalog, check technical specs, subscribe to our blog, or buy online. We are adding items and improving functionality daily!
Same Day Shipping From The USA – Our hardware products are in stock and ship to you directly from our USA based distribution centers.
Functional Equivalents To Expensive Brand Names- We stock and source alternatives to brand name fasteners, reducing long lead times and saving you money.
Creatively Solve Problems – We are sourcing experts, offer competitive pricing and specialize in finding hard to find parts and reducing long deliveries.
One-Stop Shopping On Certified Hardware – We stock and source a full line of fasteners including Mil-Spec, DFARS compliant and other industrial products.
WBE/WOSB Woman Owned Certified Small Business – To meet your diversity & set-aside needs.

“Heli-coils®” vs. “Keenserts®”: 3 differences you must know-Part 1 of 2 (Refreshed for 2023)

Posted: September 7, 2023 | Author: mfsupplyblog | Filed under: Brand equivalents, Helical, helical wire inserts, keensert, key-locking inserts, Wire Inserts | Tags: heli-coil, helical wire insert, keensert, key-locking insert, threaded bushing, threaded fastener, threaded insert | 1 Comment

Today we will re-introduce you to our blog, “Heli-coils®” vs. “Keenserts®”: 3 differences you must know-Part 1 of 2, published back on 2020. We will compare these two fastener products that are used to repair damaged threads & threaded holes, or to strengthen/reinforce a weaker parent material like aluminum. Both Helical Wire Inserts & Key-locking Inserts are commonly used in precision manufacturing, transportation and aerospace applications. Their versatility, however, ensures their presence in nearly every industry that utilizes threaded fasteners.

What are the main uses of Threaded inserts?

Both “Heli-coil®” or Helical wire inserts and “Keensert®” or Key-locking inserts fall under the “Threaded Insert” category of fasteners.

Threaded insert, also known as a threaded bushing, is an insert that has internal threads, and is fastened into an object to add or reinforce a threaded hole. Threaded inserts may be used to repair a stripped threaded hole, provide a durable threaded hole in a soft material, place a thread on a material too thin to accept it, mold or cast threads into a work piece thereby eliminating a machining operation, or simplify changeover from unified to metric threads or vice versa. Although Helical Wire inserts and Key-locking externally threaded inserts are used in similar ways, there are 3 main distinctions that we detail below. But first, let’s take a closer look at each of these fasteners:

What is a Helical Insert Wire Insert? (aka Heli-coil®)

Helical wire inserts are precision-formed continuous wire coils that provide permanent, wear-resistant threads which exceed the strength of the parent material. Often underestimated, the popular misconception is that Helical wire inserts are intended solely for thread repair, when, in fact, they have other significant uses. Not to be confused with other types of threaded inserts or rivnuts, Helical wire inserts resemble springs and are sometimes referred to as “Screw Thread Inserts (STI)” ,“Helicals” or by the popular brand “Heli-Coil®” which is a registered trademark of Emhart® Teknologies, Inc.

Three typical applications for using Helical wire inserts are:

to repair damaged threads in parts that would otherwise have to be scrapped
to strengthen threads against failures due to stripping, seizing or corrosion
to convert threads between inch and metric sizes

What is a Key-locking insert? (aka Keensert® or Keysert®)

The Key-locking threaded insert is a solid bushing style insert that is threaded on both the inside and the outside and has wedges or “keys” attached to the top of the insert. These externally threaded inserts are used to distribute loads and repair or strengthen threads against failures due to stripping, seizing or corrosion. Key-locking inserts are commonly used in high torque and high temperature situations, and in applications where fasteners may be repeatedly removed and reassembled. Key-locking inserts are often referred to as Keenserts® and Keyserts®, which are registered trademarks for the most popular brand names for this part. (Keensert® is a registered trademark of Huck Patents, Inc. & Keysert® is a registered trademark of Alcoa Fastening Systems).

Typical applications are transmission housings, electronic equipment and suspension units. Key-locking inserts are commonly found in aerospace assemblies.

How do they work?

Helical wire inserts work because the diamond shaped helically formed wire coil screws into a threaded hole to form a mating internal thread for a screw or stud.

Key-locking inserts are threaded into a pre-tapped hole, and then the keys are hammered into grooves through the threads, permanently locking the insert in place. Their “keys”, which are driven down into the tapped threads, provide a mechanical lock against rotation, especially when the mating stud or bolt will be removed frequently.

What materials, sizes and styles are available?

Key-locking Inserts/ Keenserts®

Key-locking inserts come in four main styles: Miniature, Thin Wall, Heavy Duty Wall (general purpose) and Extra Heavy Duty.

Miniature Key-locking inserts are used in electronic and aerospace applications where size and strength are critical. These inserts may be installed in sheet material as thin as 1/16″.
Thinwall inserts have smaller external threads than standard heavy-duty inserts and are ideal for tight spaces where less pull-out strength is acceptable.
Heavy Duty inserts have a thick, heavy-duty thread wall, suitable for most applications.
Extra-heavy duty inserts are used in oversized and overly worn holes.

Key-locking inserts can be internally self-locking or non-locking (the standard is non-locking and is sufficient for the most common applications).

Inserts with the internal self-locking feature are designed to securely lock a bolt when it is entered into the insert only a few turns. Even after repeated installations and removals of the bolt, the lock maintains sufficient locking torque to prevent the bolt from vibrating out.

Common Materials available include Carbon steel, Stainless Steel, Alloy 4140 and A286. Nitronic and other materials may be available with a lead time.

Internal Diameters available: American/Inch #2-56 to 1 ½-6 ” and Metric M2 to M24

Helical wire inserts / Heli-Coils®

Helical wire inserts come in 2 main styles: tanged and tangless (currently, MF Supply specializes in the tanged style).

The original and widely used tang style has a prong at one end to facilitate installation. The newer tangless style has no prongs to break off, retrieve, or lose. Tangless inserts are commonly used in electronic applications where loose tangs are might cause damage.

Helical wire inserts can be free-running or self-locking.

Free running is the most common style used for thread repair. The “free” diameter of the insert is larger than the installed diameter and this configuration generates balanced pressure distribution between the coils and threads.

Self-locking style inserts are recommended for applications that require constant torque, or are subject to stress or vibration. The locking style features a crimped turn that acts as a locking mechanism that grips the bolt or screw to prevent loosening from vibration, eliminating the need for lock wiring, lock-nuts, lockwashers, pellets/patches or other thread locking devices.

Common Materials available include Stainless Steel, Phosphorous Bronze, Inconel X-750 and Nitronic 60 and 90.

Internal Diameters available: American/Inch #2-56 to 1 ½-6” and and Metric M2 to M24. Standard inserts lengths measure from 1x to 3x the diameter. Note: larger sizes may be available by special order.

Why use a Key-locking insert vs. a Helical wire insert?

There are three main differences between Key-locking inserts and Helical wire inserts:

1) Strength: Key-locking inserts are stronger than Helical wire inserts

2) Ease of installation: Key-locking inserts are easier to install than Helical wire inserts

3) Price: Key-locking inserts are more expensive than Helical wire inserts!

So here is some direction on how to select the correct threaded insert for your application: In heavy wear, high vibration and high heat situations where saving space is not a concern and hole depth is limited, Key-locking inserts are the best bet.

When reducing costs and minimizing space are priorities, Helical wire inserts are the way to go. They are particularly useful for creating permanent strong threads in softer materials such as aluminum, titanium and magnesium alloys, and are best suited to lower heat and lower torque environments.

Stay tuned for our next blog, where we discuss, brands and mil-spec options, how to order and installation options!

Key-locking Inserts (Keenserts®) & Helical Wire Inserts at MF Supply

MF Supply is a WBE/WOSB woman owned business, and a trusted supplier of Keenserts & Helical Wire Inserts for manufacturers, government and industry.

We Invite You To Request a Quote, Download a Guide or a Line Card Today!

Full ecommerce enabled website with technical manual available 24/7
Same day drop ship from factory for thousands of items.
Functional Equivalents to expensive brand name fasteners save money and reduce long lead times.
Creatively solve problems including hard to find parts and long lead times
WBE/WOSB Woman Owned Certified Small Business.

Book a one-on-one consultation with our President, Robin, to discuss how MF Supply can help you solve your Industrial Sourcing, Fastener, and Safety concerns.

Six Reasons To Buy From MF Supply

Full eCommerce Enabled Website With Technical Manual Available 24/7 – Visit our website and Create a New Account, track online orders, browse our product catalog, check technical specs, subscribe to our blog, or buy online. We are adding items and improving functionality daily!
Same Day Shipping From The USA – Our hardware products are in stock and ship to you directly from our USA based distribution centers.
Functional Equivalents To Expensive Brand Names- We stock and source alternatives to brand name fasteners, reducing long lead times and saving you money.
Creatively Solve Problems – We are sourcing experts, offer competitive pricing and specialize in finding hard to find parts and reducing long deliveries.
One-Stop Shopping On Certified Hardware – We stock and source a full line of fasteners including Mil-Spec, DFARS compliant and other industrial products.
WBE/WOSB Woman Owned Certified Small Business – To meet your diversity & set-aside needs.

MF Supply's experts discuss fasteners and electronic hardware

A Buyer’s Case Study on Compliance + Speed

The MF Supply Value Proposition

The Challenge: Compliant Part, Short Lead Time, Complete Documentation

The Situation: “We Need It Now… and It Needs To Pass Audit.”

The Solution: Cross-Reference to an In-Stock Mil-Spec Option (With Paperwork)

When Cross-Referencing Helps (And When It Doesn’t)

Buyer Takeaway: In-Stock + Paperwork=Shorter Lead Times, No Surprises

Your Purchasing Department’s Secret Weapon!Here are 5 reasons to buy from MF Supply

Share this:

Like this:

What Product Categories Have Cross-Reference Tables?

Brands Commonly Included in Cross-Reference Comparisons

How to Use Our Cross-Reference Tables (5-Step Method)

When to Cross vs. When to Stay On Brand

Case Studies Proving It Works

Need Help? We’ll Build the Cross For You

Your Purchasing Department’s Secret Weapon!Here are 5 reasons to buy from MF Supply

Share this:

Like this:

What Is A286?

Why Choose A286 Keenserts®?

How to Identify A286 in Part Numbers

A286 Keenserts® Series & Styles

Industries That Rely on A286 Keenserts®

MF Supply, Your Trusted Source for A286 Keensert® Style Key-Locking Inserts

Six Reasons To Buy From MF Supply

Share this:

Like this:

What Makes Nitronic Special?

Nitronic Keenserts® vs. Helicoils

Nitronic Keenserts® Series and Standards Available

Industries That Benefit From Nitronic Keenserts®

MF Supply, Your Trusted Source for Nitronic Keensert® Style Key-Locking Inserts

Six Reasons To Buy From MF Supply

Share this:

Like this:

What Is a Floating Keensert®?

In What Series, Sizes and Materials are Floating Keenserts® Available?

What Are the Benefits and Possible Applications for Floating Keenserts®?

MF Supply Is Your Source for Floating Keensert® Style Key-Locking Inserts!

Six Reasons To Buy From MF Supply

Share this:

Like this:

Is There an Available Functional Equivalent to My OEM Brand?

Do Keenserts® Have Functional Equivalents?

Keensert® Equivalent Cross Reference Charts: Find OEM Brands, Mil-spec & Functional Equivalents

Keensert® Style Key-Locking Inserts at MF Supply

Your Purchasing Department’s Secret Weapon!Here are 5 reasons to buy from MF Supply

Share this:

Like this:

What are Carbon Steel Key-Locking Inserts?

What Styles, Standards & Sizes Are Available?

The Carbon Steel Difference!

Carbon Steel Key-Locking Inserts at MF Supply!

Six Reasons To Buy From MF Supply

Share this:

Like this:

Why Nitronic 60 Key-locking Inserts? The Vanguard of Resilience

The Rust Doesn’t Sleep, But You Can

Strength That Speaks Volumes

The Nitronic 60 Difference

A Spectrum of Possibilities

Discover More, Achieve More

Six Reasons To Buy From MF Supply

Share this:

Like this:

Threaded Inserts’ Brands & Equivalents

Mil-Spec Options

How to Order

Key-locking Inserts (Keenserts®) & Helical Wire Inserts (Heli-Coils®) at MF Supply

Six Reasons To Buy From MF Supply

Share this:

Like this:

What are the main uses of Threaded inserts?

What is a Helical Insert Wire Insert? (aka Heli-coil®)

What is a Key-locking insert? (aka Keensert® or Keysert®)

How do they work?

What materials, sizes and styles are available?

Why use a Key-locking insert vs. a Helical wire insert?

Your Purchasing Department’s Secret Weapon!
Here are 5 reasons to buy from MF Supply

Your Purchasing Department’s Secret Weapon!
Here are 5 reasons to buy from MF Supply

Your Purchasing Department’s Secret Weapon!
Here are 5 reasons to buy from MF Supply