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].

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.

Shop E-Z LOK Threaded Inserts, Installation Tools & Thread Repair Kits at MF Supply

Posted: September 12, 2024 | Author: mfsupplyblog | Filed under: E-Z LOK, Fasteners, helical wire inserts, Installation Tools, Thread Repair Kits, Threaded Bushing, Threaded Fasteners, Threaded Inserts | Tags: E-Z LOK, E-Z LOK Distributor, E-Z LOK Installation Tools, E-Z LOK Supplier, E-Z LOK Thread Repair Kits, E-Z LOK Threaded Inserts, EZ LOK | Leave a comment

Are you a precision engineer or industrial manufacturer looking for reliable threaded inserts and installation solutions? Look no further! MF Supply is an authorized E-Z LOK distributor, and we are proud to offer the complete range of over 1,300 unique E-Z LOK products, providing high-quality threaded inserts, installation tools, and thread repair kits to meet your most demanding project requirements. Whether you are in the automotive industry, aerospace, or heavy manufacturing, E-Z LOK solutions are designed to improve efficiency and ensure the durability of your project.

Buy E-Z LOK Threaded Inserts, Installation Tools, and Kits at MF Supply!

Why Choose E-Z LOK Products?

As a precision engineer or industrial manufacturer, you know that quality, durability, and ease of installation are critical factors for maintaining optimal performance.

E-Z LOK is a trusted brand name in threaded insert solutions across a wide range of industries. Their products are engineered to meet rigorous quality standards such as TSCA PBT, RoHS, REACH, DFARS, and ITAR, ensuring excellent performance in the most demanding applications. If you need to repair stripped threads or create reliable, wear-resistant threads in materials like wood, plastic, or metals, E-Z LOK threaded inserts, installation tools & thread repair kits provide all the solutions you need! E-Z LOK products provide:

Thread repair and reinforcement in metals, woods, and plastics.
Durable holding power in materials that are too soft or thin to hold threads on their own, or in materials with unthreaded, damaged or stripped holes.
Versatility in their range of threaded insert designs, including thin wall, standard wall, extra heavy wall, screw-locking, and automotive options.
Corrosion-resistant materials, such as Brass and 303 & 316 Series Stainless Steel for long-lasting performance in harsh environments.
Easy installation with or without specialized tools and kits, reducing downtime and extra costs.

The Complete Range of E-Z LOK Products at Your Finger Tips

We offer the complete selection of E-Z LOK products directly on our website, making it easier for you to find exactly what you need for you project at your fingertips. Below is an overview of the E-Z LOK product categories available.

1 – E-Z LOK Threaded Inserts:

Threaded inserts are crucial components used to add strong, durable threads in softer materials or to repair damaged threads in existing assemblies. If you’re working with metal, wood, or plastic, E-Z LOK threaded inserts offer the perfect solution for reinforcing threads; repairing stripped or damaged threads without re-machining the entire part; and ensuring long-lasting, wear-resistant connections in high-stress applications. These threaded inserts are available in thread sizes ranging from 0-80 through 1-1/2-12 for inch/imperial sizes, and M2 x 0.4 through M39 x 4 for metric thread sizes. Materials offered include Aluminum, Brass, Carbon Steel, 303 & 316 Series Stainless Steel, and Zinc.

E-Z Coil™ Threaded Inserts: Designed for repairing damaged threads or creating new threads in softer materials like aluminum and magnesium. Made from high-quality Carbon Steel, Stainless Steel, and Zinc, they provide strong, permanent threads.
E-Z Fin™ Threaded Inserts: Ideal for applications in plastics and soft metals, ensuring secure fastening and vibration resistance. Available in Brass and Stainless Steel.
E-Z Hex™ Threaded Inserts: Perfect for applications requiring frequent disassembly and reassembly, these inserts offer a secure fit and easy handling due to their hexagonal shape, which prevents rotation.
E-Z Knife™ Threaded Inserts: Suitable for hard woods and thermoset plastics, providing high pull-out strength and vibration resistance with a knurled exterior for superior grip.
E-Z Press™ Threaded Inserts: Designed for plastics and soft metals, these press-fit inserts offer high pull-out resistance without the need for thread tapping.
E-Z LOK™ Threaded Inserts: Versatile inserts for various materials, offering strong threads in Brass, Carbon Steel, Stainless Steel, and Zinc.
E-Z Sonic™ Threaded Inserts: Used in applications requiring ultrasonic or heat installation in thermoplastics, ensuring a secure fit.

2 – E-Z LOK Threaded Inserts Installation Tools

One of the major benefits of E-Z LOK threaded inserts is that they are designed for easy installation. Most inserts can be installed without the need for specialized tools, but for high-precision or high-volume projects, having the right tools can be the difference between meeting or failing a deadline. Hence, the comprehensive list of E-Z LOK installation tools, which are engineered to meet ASME and ANSI industry standards, ensure that you get the job done with precision and quickly. Installation tools available include:

E-Z Coil™ Installation Tool: Ensures proper insertion and secure fit of E-Z Coil™ Threaded Inserts, which are available in various sizes.
E-Z LOK™ Drills (Brad Point HSS, Reduced Shank, HSS): Used for precise drilling in wood, plastic, and metal, ensuring clean and accurate holes for insert installation.
E-Z LOK™ Threaded Insert Drive Tools: Designed for driving inserts into pre-drilled holes, ensuring proper alignment and secure fit.
E-Z Coil™ Extract Tool & Tang Break Off Tool: Facilitates easy removal and clean installation of E-Z Coil™ Threaded Inserts.
E-Z LOK™ Taps (HSS Standard Bottoming, Standard Bottoming, HSS STI Bottoming): Used for creating accurate and durable threads in various materials, specifically for E-Z Coil™ inserts.

3 – E-Z LOK Threaded Inserts Installation and Thread Repair Kits

E-Z LOK thread repair kits offer a fast, cost-effective solution. These kits include all the necessary components for quick, reliable thread repairs in metals, plastics, and wood, ensuring minimal downtime, maximum efficiency, and long-lasting durability in high-stress environments. With E-Z LOK’s reputation for quality and ease of use, these kits help maintain equipment performance and extend service life. Available kits include:

E-Z LOK™ Coil Thread Repair Kit: Comprehensive kit for repairing damaged threads in metals, including inserts, drills, taps, and installation tools.
E-Z Hex™, E-Z Knife™ Threaded Insert Installation Kits: Ensure secure installation with all necessary tools and inserts.
E-Z LOK™ Thread Repair Kit: Versatile kit for general-purpose thread repair, offering a range of tools and inserts.
E-Z LOK™ Threaded Insert Assortment Kit: Provides a variety of inserts and tools for multiple applications.
E-Z LOK™ Solid Wall Thread Repair Kit: Ensures strong and durable threads in high-stress applications.
E-Z Sonic™ Threaded Insert Assortment Kit: Comprehensive kit for ultrasonic and heat installation in thermoplastics, providing secure and reliable threads.

Why Buy E-Z LOK Thread Inserts, Tools & Kits from MF Supply?

MF Supply is a leading supplier of threaded inserts including E-Z LOK threaded inserts, Keensert® style key-locking inserts and helical wire inserts. We stock and source a huge inventory, including major OEM brands and equivalents to HeliCoil®, Recoil®, KATO®, PowerCoil, Bollhoff, Perma-Coil, V-Coil, Time-Sert and more — in inch/imperial, metric and Mil-Spec sizes and materials. Our Mil-Spec products are DFAR compliant with COC and full certifications available upon request.

Shop the complete catalog of E-Z LOK products directly on our website!

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 you 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].

Ultimate Guide: Helical Inserts, aka HELICOIL, Cross Reference Guide!

Posted: June 25, 2024 | Author: mfsupplyblog | Filed under: Cross Reference Charts, Helical, Helical Threaded Inserts, helical wire inserts, Wire Threaded Inserts | Tags: Cross Reference Charts, heli-coil, Helical Inserts, Helical Inserts Cross Reference Guide, Helical Threaded Inserts, helical wire inserts, helicoil, manufacturing, Precision Engineering, Precision Manufacturers, threaded inserts, Wire inserts, Wire Threaded Inserts | Leave a comment

If you’ve done your homework, you probably already know that the industrial marketplace is home to a myriad of trademarked – OEM branded expensive fasteners and components. Many branded parts have generic alternatives. Similar to how brand-name products like Kleenex® can be found generically as facial tissues, many brand-name fasteners are also available as “generics,” “crosses,” “alternatives,” or “functional equivalents.”

Functional Equivalent Fastener? What is it?

In the fastener industry, a functional equivalent fastener is a part that replicates the brand-name product in form, fit, and function, including material and plating specifications, but is produced by a different manufacturer. This allows you to get the same performance and quality, often at a lower cost and with shorter lead times.

Which OEM Brands Have Functional Equivalent Fasteners?

A significant number of OEM brands out there have generic functional equivalents. Here is a shortlist 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®, GLOBE ELECTRONICS, GRIPCO®, H. H. SMITH, HELICOIL®, HOWMET, HUCK, INDUX, INTERFAST, KATO®, KEENSERT®, KEYSTONE, LOCTITE®, LYN-TRON, MACLEAN ESNA®, MARSON®, MCMASTER-CARR, MISUMI, MSC INDUSTRIAL, PEM®, PIC DESIGN®, POP®, POWERS®, QUICKSCREWS, RAF, RECOIL®, RED HEAD®, ROTOR CLIP®, SHEREX, SIMPSON, SOUTHCO®, SPS TECHNOLOGIES, TINNERMAN®, U. S. ANCHOR, UNICORP, VIP, W. M. BERG, W. W. GRAINGER, WALDES TRUARC®.

Do Helical Inserts Have Functional Equivalents?

One example of an OEM hardware brand is the trademarked name Helicoil®. Although the name Helicoil® is often used to refer to helical inserts (also known as helical wire, wire inserts or wire threaded inserts)—similar to how Band-Aid® is used to describe adhesive bandages, Helicoil® is the registered trademark of Stanley Engineered Fastening (recently acquired by Bollhoff).

The same helical inserts manufactured under the Helicoil® brand name are also available from alternative manufacturers under brand names such as CHRISLYNN, Recoil®, and KATO®, E-Z Lok and Powercoil. These inserts can also be identified by their Mil-Spec numbers, which include: MS122076 through MS122275, NAS1130, MS124651 through MS124850, MS21208, MS21209, MS122076, MS33537, MA3279, MA3329, and NA0276 series. Note: All of these offerings are the tanged version of helical inserts.

Here at MF Supply, we provide a comprehensive cross-reference guide to help you find the perfect alternative to meet your needs. Check out our most popular helical inserts cross-reference charts below to see if there is a functional equivalent to your OEM branded product! They come in imperial, mil-spec and metric sizes and materials.

Helical Inserts Equivalents Cross-Reference Charts: Find OEM Brands and Functional Equivalents

Helical Insert Inch & Mil-Spec Cross Reference Charts

Helical inserts, in imperial/inch & mil-spec sizes, are available as free running coarse thread (UNC), self-locking coarse thread (UNC), free running fine thread (UNF), and self-locking fine thread (UNF) in stainless steel material with Tang.

Mil-Spec series include: MS122076 through MS122275, NAS1130, MS124651 through MS124850, MS21208, MS21209, MS122076, MS33537, and NA0276 series.

Helical Insert Metric Cross Reference Charts

Helical inserts, in metric sizes, are available as free running coarse thread, self-locking coarse thread, free running fine thread, and self-locking fine thread in stainless steel material with Tang.

series include: MA3279, and MA3329.

Using functional equivalents, including Mil-Spec, generics and other OEM brands’ versions of helical inserts, is a smart practice that manufacturers’ often use to save money and shorten lead times!

Helical Inserts at MF Supply

MF Supply is a leading supplier of Helical Inserts including major brands and equivalents. We stock a huge inventory including free running coarse thread (UNC), self-locking coarse thread (UNC), free running fine thread (UNF), and self-locking fine thread (UNF) helicoil inserts in imperial/inch, mil-spec and metric sizes, and in stainless steel with tang. Our Mil-Spec products are DFAR compliant with COC and full certifications available upon request.

Product Lines Include:

Manufacturers working with us can expect timely deliveries, competitive pricing, and access to expert guidance to help optimize their fastener choices. Explore our product catalog by visiting our website at www.mfsupply.com, reaching out to us at sales@mfsupply.com, or requesting a quote.. Our MF Supply team of sourcing experts is here to 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].

“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.

What is the Difference Between a Keensert and a Helical Insert?

Posted: March 16, 2021 | Author: mfsupplyblog | Filed under: helical wire inserts, key-locking inserts | Tags: heli-coil, helicals, Keenserts, Key Locking Inserts, Wire inserts | Leave a comment

What is a Helical Inset?

A Helical wire insert is a spring-like precision form wire coil that provides a permanent thread that’s stronger than the parent material. They are also often called a screw thread insert or a Helical insert, but the popular brand name is Heli-Coil, a registered trademark of Emhart Teknologies.

What is a KeyLocking Insert?

A key-locking insert is a solid bushing style insert that is threaded on the inside and the outside with keys on the top. It’s commonly called a Keensert or Keysert, and these are the registered trademark names of Huck Patents and Alcoa Fastening Systems.

Why Would I Use a Helical Insert vs. a Keensert, and Vice Versa?

Strength: A key-locking insert is much stronger than a helical insert, particularly in high temperature and high torque environments.
Ease of Install: A key-locking insert is easier to install than a helical wire insert.
Price: A wire insert is much less expensive than a key-locking insert.

When Would I Use a Keensert?

In a heavy-ware, high vibration, high heat situation when you don’t need to save space and the whole depth is not a key consideration. The key-locking insert is the way to go.

When Would I Use a Helical Insert?

If you need to reduce costs, you’re minimizing space. The Helical wire insert is the way to go. They’re very useful for creating a permanent, strong thread and softer material like aluminum or titanium. And they’re best suited to the lower heat environments.

Learn more about the difference between key-l ocking inserts and helical wire inserts here!

Learn More About Keenserts vs. Helical Inserts

If you are interested in learning more about our Keensert and Helical Insert product offerings, contact us today! If you’re ready to place your order, check out our products here!

“Heli-coils” vs. “Keenserts”: 3 differences you must know-Part 1 of 2

Posted: February 21, 2020 | Author: mfsupplyblog | Filed under: Brand equivalents, Helical, helical wire inserts, keensert, key-locking inserts, Wire Inserts | Tags: heli-coil | 4 Comments

Today we will compare 2 popular fastener products that are used to repair damaged threads or strengthen a weaker parent material like aluminum: Helical Wire Inserts and Key-locking Inserts. Both are commonly used in precision manufacturing and aerospace applications.

What are the main uses of these threaded inserts?

Both “Heli-coil” or Helical wire inserts and “Keensert” or Key-locking inserts fall under the “Threaded Insert” category of fasteners. A threaded insert, also known as a threaded bushing, is a fastener element that is inserted into an object to add a threaded hole. They 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 1) to repair damaged threads in parts that would otherwise have to be scrapped; 2) to strengthen threads against failures due to stripping, seizing or corrosion; 3) 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.

What materials, sizes and styles are available?

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).

Common Materials available include Carbon steel, Stainless Steel, Alloy 4140 and A286.

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

Helical wire inserts

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

Helical wire inserts can be free-running or locking.

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.

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!

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

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 Equivalentsto 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.

Request A Quote

Please forward you comments to robin@mfsupply.com

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What are the main uses of Threaded inserts?

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

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How do they work?

What materials, sizes and styles are available?

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

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

Six Reasons To Buy From MF Supply

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What is a Helical Inset?

What is a KeyLocking Insert?

Why Would I Use a Helical Insert vs. a Keensert, and Vice Versa?

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When Would I Use a Helical Insert?

Learn More About Keenserts vs. Helical Inserts

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Here are 5 reasons to buy from MF Supply

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Here are 5 reasons to buy from MF Supply