Top 17 Keensert® Questions: Expert Answers to Common Questions (Part 1)
Posted: March 27, 2025 Filed under: Inch and Mil-Spec Keensert, keensert, Keenserts Frequently Asked Questions, Metric Keensert | Tags: Expert Answers to Keenserts Frequently Asked Questions, Keensert FAQs, Keensert Guide, Keensert Inserts, Keensert Installation Tools, Keensert Supplier, Key-Locking Inserts, supply chain Leave a comment
Navigating the world of key-locking inserts—Keenserts®—doesn’t have to be complicated. Our comprehensive guide with 17 frequently asked questions cuts through the confusion, addressing the top issues related to selecting, shopping for and installing key locking inserts. In this first installment of our 3 part series, we’ll cover the first 7 questions which focus on the fundamentals, including the differences between self-locking and standard inserts, installation essentials, and common questions when drilling and tapping the holes in the parent material.
1 – What is the difference between a key locking and a self-locking Keensert®?
A key locking threaded insert, also known by its trademarked name Keensert®, is a solid bushing style insert with both internal and external threads. It has wedges or “keys” on one end that lock it into place after installation, preventing loosening due to vibration. All Keenserts® are key-locking inserts. Key-locking inserts come in self-locking and non-self-locking styles (sometimes referred to as free-running). Self-locking style key-locking inserts have a distorted internal thread that creates a mechanical lock, making them some of the strongest inserts available. This mechanical self-locking feature is stronger than adhesive-based chemical thread-lockers.
2 – What tools do I need to install a key-locking insert?
To properly install a key-locking insert, AKA Keensert®, you will need the following tools:
- Drill: to make a hole in the parent material.
- Tap: To tap threads that will accept the external thread of the insert.
- Keensert® Installation Tool & Hammer: to drive the keys into the parent material.
Depending upon your application, you may also require a countersink tool and a broaching tool. Note: If you have a few hundred inserts to install, the manual process detailed above works fine. However, if you are installing these Keenserts® by the thousands, then you will want to use a pneumatic power tool to speed up the processes.
3 – How do I install key-locking Inserts?
To manually install a key-locking insert it requires a 4-step process:
- Drill a hole and countersink the parent material. Note: The drill size is specific to the Keensert® you are installing.
- Tap threads into the parent material according to the insert’s external thread, pitch and tolerance.
- Manually screw the key-locking insert into the tapped hole.
- Place the installation tool on top of the insert. Strike with a hammer to drive down the locking keys creating a mechanical lock.
4 – What is a broaching tool and when will I need one?
A broaching tool is an extra installation tool that is used in hard material. Parent materials harder than RC30, such as A286, A4140 or anodized aluminum may require the tapped holes be broached prior to installing the key-locking insert. The broaching tool has blades that create slots so the keys can be driven into the parent material.
5 – Where do I find the drill size to install a key-locking insert?
The drill size for a key-locking insert is typically found in the product specifications or installation guide provided by the manufacturer.
Note: The outer diameter of Keenserts® are slightly larger than the standard drill hole to ensure a tight fit and sufficient thread engagement in the base material, compensating for tapped hole variations.
6 – Where do I find the tap size to install a key-locking insert?
The tap size for a key-locking insert is typically found in the product specifications or installation guide provided by the manufacturer. The tap will typically match the size, pitch and tolerance of the insert’s external diameter and thread.
7 – How do I find the correct tool to install my Keensert®?
The correct installation tool is usually specified by the Keensert® manufacturer and can be found in the product’s documentation or on the manufacturer’s website. Installation tools are specific to the external and internal diameter of each unique insert part number. Note: Some tools work for multiple sizes.
Stay tuned for the next installment in this series, where we’ll dive into frequently asked questions about Keensert® measurement differences, material selection options, and more!
In the meantime, if you have any questions, feel free to Connect with our team or send us a request for quote and our 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].
Mil-Spec Fasteners in Stock at MF Supply
Posted: November 27, 2024 Filed under: Mil-Spec, Mil-Spec Electronic Hardware, Mil-Spec Fasteners | Tags: Fasteners, Hardware, Mil-spec fasteners, Mil-Spec Fasteners Distributor, Mil-Spec Fasteners Supplier, Mil-Spec Helical Inserts, Mil-Spec Hex Head Cap Screws, mil-spec keenserts, Mil-Spec Self-Tapping Screws, Mil-Spec Set Screws, Mil-Spec Socket Head Cap Screws, Military Electronic Hardware Supplier, Military Fasteners, Military Fasteners Supplier, supply chain Leave a comment
Are you searching for certified Mil-Spec fasteners to meet your bill of requirements (BOM) or project specifications? Look no further! MF Supply specializes in sourcing and supplying domestically manufactured AN, MS, and NAS Mil-Spec fasteners for aerospace, defense, and industrial applications. MF Supply stocks over 3,000 unique certified parts from the Qualified Suppliers List for Manufacturers & Distributors (QSLM & QSLD). Mil-Spec products stocked include Keensert® Style Key-Locking Inserts, Helical (HeliCoil®) Inserts, Precision Dowel Pins, Slotted Spring Pins, Extended Prong Cotter Pins, Nuts, Washers, Machine Screws, Precision Shoulder Screws, Hex Head Cap Screws/Bolts, Socket Head Cap Screws, Set Screws, Self-Tapping Screws and more. All Mil-Spec parts undergo rigorous testing and are DFARS or domestically manufactured with Certificate of Conformance (COC) and Material and Physical certification paperwork available to ensure compliance.
Buy Mil-Spec Fasteners and Precision Electronic Hardware at MF Supply!
We Have All the Mil-Spec Fasteners and Precision Hardware You Need
We offer a huge selection of DFARS certified and domestic Mil-Spec fasteners directly on our website, making it easier for you to find exactly what you need for your project at the click of a button or via RFQ depending on your preferred method of procurement. Below is a list of some of our most popular Mil-Spec product categories available:
1 – Mil-Spec Keensert® Style Key-Locking Inserts
- Standards: MS51830, MS51831, MS51832, NA0146, NA0147, NA0148, NA0149, NA0150, NA0151, and NAS1395.
- Styles: Miniature, Thin Wall, Heavy Duty, Thick Wall, and Extra Heavy Duty
- Available Sizes: 2-56 to 1/2-13 Internal thread for inch sizes and M2 x 0.4 to M24 x 2 for metric sizes
- Materials: 4140 alloy steel, Nitronic 60, CRES A286 and 303 series stainless steel
- Applications: Can be used to create new threads, for thread reinforcement, and to repair stripped threads
2 – Helical Inserts (aka HeliCoil®)
- Standards: MS121, MS122, MS124, MS21209, MA3279, and MA3329
- Styles: Free-running and self-locking
- Available Sizes: #2-56 to 1½-6 for inch sizes and M2 to M36 for metric sizes
- Materials: CRES 300/18-8 stainless steel
- Applications: Can also be used to create new threads, for thread reinforcement, to convert threads between inch and metric sizes, and to repair stripped threads
3 – Mil-Spec Precision Dowel Pins
- Standards: MS16555, MS16556, and MIL-P-21143
- Styles: Interference/Press Fit, Undersize/Slip Fit and Oversize +.001
- Sizes: Diameters from 1/32 to 1 inch and lengths from 3/32 to 6 inches
- Materials: CRES 303, 400, 416 series stainless steel
- Applications: Can be used as a hinge, shaft, precise location device or pivot to align or secure parts within a precision assembly or fixture
4 – Mil-Spec Slotted Spring Pins
- Standards: MS16562
- Styles: Slotted
- Sizes: Diameters from 1/16 to ½ inch and lengths from 3/16 up to 3 inches long
- Materials: Alloy steel with a zinc phosphate finish
- Applications: Can be used as a hinge or shaft for the purpose of securing and fastening components together
5 – Mil-Spec Extended Prong Cotter Pins
- Standards: MS9245
- Styles: Extended Prong
- Sizes: Diameters from 1/32 to 5/32 inch and lengths from 1/4 to 1/2 inches long
- Materials: T321 stainless steel
- Applications: Designed to retain/secure a variety of fasteners such as bolts, nuts and pins in place and prevent them from sliding or coming out
6 – Mil-Spec Hex Finished Nuts
- Standards: MS51967B & MS51967C
- Styles: Grades B & C
- Sizes: Stock sizes from 1/4-20 through 3/4-10 inches thread
- Materials: Alloy steel with a cadmium yellow finish
- Applications: Used to fasten parts together by pairing and tightly securing bolts in place
- Standards: MS35649 & MS35650
- Available Sizes: Stock sizes from 2-56 through 3/8 thread
- Materials: Alloy steel cadmium yellow and 300/18-8 series stainless steel
- Applications: Typically paired with bolts or screws to ensure parts/components stay firmly fastened in place
8 – Mil-Spec Washers
- Standards: MS51848, NAS620, MS35333, MS35335, MS35338, AN960, AN960-C, AN970, MS15795, MS27183, NAS1149 & NAS620
- Styles: flat, light flat, flat machine screw, split lock, high collar split lock, internal tooth lock, and external tooth lock
- Materials: Carbon steel, Alloy steel and 300/18-8, 316, 400 series stainless steel
- Applications: Distribute the load of a fastener, such as a bolt or screw, over a larger surface area. This in turn helps reduce the effects of wear, damage or vibration on the fastener assembly by providing a cushion between the fastener head and the parent material
- Standards: MS24693, MS35190, MS35191, MS35206, MS35207, MS35265, MS35266, MS35275, MS35276, MS51957, MS51958, MS51959, & MS51960
- Styles: 82d & 100d Flat Phillips, Drilled Slotted Fillister, Philips Pan Head
- Available Sizes: Diameters range from 0-80 to 3/8-16 inches with lengths ranging from 3/32 to 3 inches long
- Materials: Carbon steel, Alloy steel, and 300/18-8 series stainless steel
- Applications: Often used in conjunction with other fastening elements, such as washers and nuts, they have uniform threads that when fastened engage with corresponding threads in a tapped hole or nut, creating a secure mechanical connection between components
10 – Mil-Spec Precision Shoulder Screws
- Standards: MS51576 & MS51575
- Styles: Hex and slotted drives
- Available Sizes: Stock sizes range from 4-40 to 3/8-16 thread
- Materials: 300/18-8 series stainless steel
- Applications: Feature a cylindrical unthreaded shoulder that serves as a dowel or pivot point for rotating parts, also used to hold parts together within a precision assembly
11 – Mil-Spec Hex Head Cap Screws/Bolts
- Style: Hex head
- Standards: MS35307, MS35308, MS90725, MS90726, MS90728G & MS90727F, B1821
- Sizes: Stock sizes range from 1/4-20 through 1-1/4 diameter
- Materials: Alloy steel, 300/18-8 Series Stainless Steel
- Applications: Their hexagonal heads allow for the application of high torque using a wrench or socket, which enables a very tight and secure fastening for load-bearing structures in military vehicles, aircrafts and more
- Style: Socket head
- Standards: NAS1352C / MS16995, NAS1351C / MS16996, MS16997, MS16998, NAS1351N & NAS1352N, & MS24671
- Sizes: Stock sizes range from 0-80 through 1-1/2 diameter
- Materials: Alloy steel, 300/18-8 series stainless steel, A286
- Applications: These screws have a cylindrical head with a hexagonal recess (socket) that allows for tightening with an Allen wrench/hex key. The socket head design allows for use in applications where there is limited space. The hexagonal socket allows for precise control during assembly, ensuring the screw is driven straight and accurately into the desired position
Can’t find what you’re looking for in the list above? Send us an RFQ with the product description or part number that you are looking for and our MF Supply team of sourcing experts will help find what you need!
Why Buy Mil-Spec Fasteners from MF Supply?
When precision, compliance, and reliability are non-negotiable, MF Supply stands out as a trusted partner for mil-spec fasteners. Here’s why industrial buyers across aerospace, robotics, defense, and manufacturing sectors turn to MF Supply:
Compliance and Certification: MF Supply’s mil-spec fasteners meet stringent U.S. Department of Defense (DoD) specifications, including MS51830, MS51831, and more. Each fastener is available with Material and Physical Test Reports, Certificates of Conformance, and DFARS/Domestic Statements—providing peace of mind for critical applications.
Sourcing Expertise: MF Supply works with the best factories across fastener categories, offering tailored solutions based on your budget, delivery and certification needs.
Reliability Across Critical Industries: Serving aerospace, defense, robotics, automotive, and manufacturing sectors for over 50 years, MF Supply is a trusted partner for industries where delivery times, precision and reliability are non-negotiable.
Shop Over 3,000 Unique Mil-Spec Fasteners and Precision Hardware 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 Mil-Spec products’ catalog, including our other 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].
MF Supply Expands Online Product Catalog to 22,189 Unique Items and Counting!
Posted: October 26, 2023 Filed under: Bolts, DFARS, Fasteners, Holo-Krome, Mil-Spec, Plastite Alternative Screws, Socket Head Cap Screw, Supply chain - manufacturing, Taptite Alternative Screws, Threaded Fasteners, Trilobular Fasteners | Tags: Bent Anchor Bolts, Bolts, Carriage Bolts, Closed Eye Screws, Commercial Fasteners, Distributor, Elevator Bolts, Flange Bolts, Hanger Bolts, Heavy Hex Bolts, Heavy Hex Structural Bolts, Hex Head Cap Screws, Hex Head Joint Draw Bolts, Hex Machine Bolts, Hex Tap Bolts, Holo-krome, Industrial Manufacturers, Inserts, MF Supply, Mil-spec, Mil-spec fasteners, Open Eye Bolts, Plastite Alternative Screws, Plow Bolts, Precision Manufacturers, Socket Cap Screws, Sourcing Experts, Square Head Battery Bolts, Square Machine Bolts, Step Bolts, supply chain, Taptite Alternative Screws, Thread Forming Screws, Thread Rolling Screws, Timber Bolts, Track Bolts Leave a comment
Greetings to our precision manufacturing community!
MF Supply is a leading WOSB / WBE Certified distributor of commercial, mil-spec and custom made fasteners. With a legacy of over half a century and a reputation for continuously evolving to meet our customers’ needs, we are thrilled to announce the recent expansion of our online catalog to include a whopping 22,189 unique items! Our updated catalog now includes Holo-Krome branded products, non-standard, domestic and DFAR Socket Cap Screws, an extensive list of Bolts, and more Thread Rolling & Thread Forming Screws.
We are constantly evolving to meet the changing needs of manufacturers. With this strategic expansion, we underscore our commitment to as a comprehensive one-stop shop for commercial and mil-spec fasteners and hardware for industrial and precision manufacturers, ensuring our customers have a seamless and efficient purchasing experience online and offline.
New Product Highlights:
1. Socket Cap Screws: We have always stocked and sourced a variety of imported, domestic and mil-spec socket cap screws. Our recent expansion in this category include standard and nonstandard sizes, and a variety of standard and exotic materials. We are now offering more Button Head, Flat Head, Flat Head 100 degree, Low Head and Standard Socket head cap screws in a wider choice of materials including: A286, Brass, Inconel, Silicon Bronze, and 316 Stainless Steel, in addition to regular Alloy and 18-8 Stainless Steel.
2. Bolts: Our selection of bolts has undergone a significant enhancement and now includes 18 Bolt categories, in multiple sizes and materials. Materials offered include Steel, B7 Alloy, Stainless Steel, 316 Stainless Steel, Aluminum, Silicon Bronze, A2, A4, Brass, Inconel and Nickel-Copper. Our 18 bolts’ categories include:
- Bent Anchor Bolts
- Carriage Bolts
- Closed Eye Screws
- Elevator Bolts
- Flange Bolts
- Hanger Bolts
- Heavy Hex Bolts
- Heavy Hex Structural Bolts
- Hex & Square Machine Bolts
- Hex Head Cap Screw
- Hex Head Joint Draw Bolts
- Hex Tap Bolts
- Open Eye Bolts
- Plow Bolts
- Square Head Battery Bolts
- Step Bolts
- Timber Bolts
- Track Bolts
3. Holo-Krome Products: We are proud to announce the inclusion of Holo-Krome brand fasteners to our catalog. Holo-Krome, a reputable domestic OEM, is well known for their extensive offering of quality products within the Socket Products segment. We introduce the following Holo-Krome products that are now available for purchase directly in our website: Dowel Pins, Hex Socket Shoulder Screws, Socket Cap Screws, Allenuts, Socket Jam Screws, Socket Pressure Plugs, and Socket Set Screws.
4. Thread Rolling / Thread Forming Screws: We also expanded our online offering to now include over 2.7K alternatives to Plastite® & Taptite® Screws. Our recent expansion in this category include more Steel, Black Oxide and Stainless Steel screws. Our off the shelf products are ready to ship from multiple warehouses across the USA, and include:
- EJOT® PT®-Alternative, Metric
- Plas-Fix®45 and Plastite®-Alternate, Metric
- Plastite®-Alternative, Inch Sizes
- Taptite®-Alternative, Inch Sizes
- Taptite®-Alternative, Metric Sizes
By bolstering our product offering in these key areas, we aim to be the preferred supplier for manufacturers in various sectors, including: aerospace, OEMS of instrumentation, equipment and machines, architectural metal and glass, sheet metal fabrication, contract manufacturers, lighting, furniture, and elevators.
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!
“At MF Supply, we understand the dynamic needs of the manufacturing industry, including the balance of price, quality, availability and certification paperwork. The expansion of our product catalog demonstrates our commitment to being a one-stop solution for all fastener needs. Whether it’s standard fasteners, specialized custom hardware, mil-spec parts or OEM brand names like the trusted Holo-Krome brand, we have it all under one roof.” – Robin Lieberman, President of 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
- 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 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.
MF Supply Launches New Product Filter! (Refreshed for 2023)
Posted: February 7, 2023 Filed under: Domestic Fasteners, Electronic Hardware, Filter Tool, Search Tool, Supply chain - manufacturing, Women in Manufacturing | Tags: Hardware, Keenserts, manufacturing, supply chain Leave a comment
We are excited to announce our new product search and filter feature on our website!
Our new product filter lets you refine product searches by multiple attributes, including size, material, category and more. This makes it easier to navigate and search for products the way you want to. Hence, you can find the parts you need faster and more efficiently.
Simply search by your keyword…
Product Filters will appear on the left panel of our website in the following cases:
1) From the Search Navigation Bar at the top left of our home page, key in the product type, description or attributes you are seeking. i.e. inserts, then the filter appears.
And filter through your specific needs…
2) From the pages that list products available for purchase or RFQ, i.e., where the filter automatically appears.
Once the filter appears, search refinement is available based on multiple attributes including:
- Product Type & Subtype
- Size – Diameter x thread
- Length
- Head styles and drives
- Inch or Metric
- Outer Diameter x Thread
- Material
- Finish
- Standard, including OEM brand name
- More!
As always if you can’t find your specific part or product, feel free to send us a Request For Quote and our team of sourcing experts will follow up for you!
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.
To learn more about our products, visit our blog, or email us at sales@mfsupply.com
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.
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.
Read More: https://conta.cc/3Ae2RgN
MF Supply Launches New Product Filter!
Posted: November 16, 2022 Filed under: Domestic Fasteners, Electronic Hardware, Filter Tool, Search Tool, Supply chain - manufacturing, Women in Manufacturing | Tags: Hardware, Keenserts, manufacturing, supply chain Leave a commentWe are excited to announce our new search and filter feature in our website! Find the parts you need faster and more efficiently.
Read More: https://conta.cc/3Ae2RgN
MF SUPPLY EXPANDS TO NEW MARKETS THANKS TO NJMEP SUPPORT
Posted: November 23, 2021 Filed under: NJMEP, Supply chain - manufacturing | Tags: Hardware, manufacturing, njmep, supply chain Leave a comment
MF Supply relied heavily on the accurate and timely information NJMEP provided once the pandemic began.
“Our business has grown and added headcount by pivoting directions. A lot of that happened, frankly, because of the information we received from NJMEP,” Robin Lieberman, President, MF Supply explained.
Custom Made & Reworked Fasteners
Posted: August 13, 2021 Filed under: Custom Fasteners per print, Domestic Fasteners | Tags: Hardware, Keenserts, manufacturing, supply chain Leave a commentWhen off-the-shelf fasteners are not the right fit for an application, engineers and designers may require Custom Made fasteners. This may be for a prototype, a replacement of an existing part, or for a large-scale production run. Learn more about what they are and how to get an accurate quote below.
Custom Made & Reworked Fasteners at MF Supply https://conta.cc/3AiegcZ
New Inch & Mil-Spec Precision Shoulder Screws
Posted: May 21, 2019 Filed under: Precision Shoulder Screws | Tags: manufacturing, Mil-spec fasteners, Precision Shoulder Screws, supply chain Leave a comment-
- Grainger 6JY20
- Lyn-tron SS7431-00
- McMaster-Carr 94035A208
- MSC Industrial 67313726
- Pic Design 4423
- RAF 6931-SS
- WM Berg PZ-14-3
- MS51576-14
Five Reasons to buy from MF Supply
- Huge inventory including 18-8, 303, 316, 416, A2, A4 stainless in Inch & Metric, including major brands and functional equivalents
- Domestic parts with full paperwork and Certificate of Conformanceavailable
- Custom Sizes, Materials and Plating options available
- Creatively solve problems including hard to find parts and long lead times
- WBE/WOSB Woman Owned Certified Small Business
Brand Equivalent Case Study: Achieving faster delivery & lower costs using functional equivalents
Posted: October 8, 2018 Filed under: keensert, key-locking inserts, Mil-Spec, Supply chain - manufacturing | Tags: keensert, manufacturing, supply chain 1 CommentOctober 9, 2018
Here at MF Supply we spend a lot of time sourcing hard to find, back-ordered or out of stock OEM hardware brands for our customers. 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. Using equivalents and alternatives to OEM brand names can be a smart way to reduce long lead times and/or cut expenses.
Check out this Case Study where an OEM brand was substituted with a functional equivalent, reducing costs by 59% and shaving lead time by over 20 weeks. This time and money savings gave the manufacturer an advantage over their competition, which helped them win the job.
ISSUE
A Tier 3 aerospace manufacturer of subassemblies is bidding on a job for a large international Aircraft OEM where the bill of materials calls for 172 pieces of a 1/4-28 x 1/2-20 Floating Key-Locking Insert in A286 stainless steel with a Fairchild/Alcoa Keensert® part number KNKDL428JT. As the part is in nonstock status at Alcoa, the delivery time is 28-29 weeks (yes that is half of one year which can be standard for aerospace related and mil-spec parts). Here is the dilemma – based on this delivery schedule, the manufacturer cannot meet their prospective client’s two month delivery requirement.
SUGGESTED SOLUTION
MF Supply gets a print of the part and is able to cross it to an exact functional equivalent for an alternative brand we distribute. Our factory can manufacturer and deliver the part in 4-5 weeks at 1/2 the cost of the OEM brand fastener. The alternative parts will be manufactured with full lot traceability and manufacturer’s test reports, a certificate of conformance and a DFARS statement. The client (Aircraft OEM) approves the substitution and awards the manufacturer the business based on their ability to make the 2 month delivery requirement. A Purchase Order for the Floating Key-Locking Insert is issued to MF Supply. As promised, within 5 weeks, the complete 172 inserts, with full paperwork, are delivered to the manufacturer. The subassemblies are produced and delivered to the end client on time and underbudget.
TIME SAVINGS
-MF Supply functional equivalent fasteners shorten delivery time from 28-29 weeks to 5 weeks.
COST SAVINGS
-KNKDL428JT price = $200 each. Total cost $34,400.
-MF equivalent price = $82.00 each. Total cost $14,104.
-Savings=$20,296!
SUMMARY / BENEFIT
-Cost savings of $20,296 or 59% (not a typo!).
– Tier 3 aerospace manufacturer wins bid and is awarded job.
-Work is completed on time.
-Job is more profitable due to cost savings realized on inserts.
-Job has been a repeater and a money maker for Tier 3 aerospace manufacturer.
In summary, if your bill of materials calls for an OEM brand fastener or component, find out if you must have the brand name product. In cases where a generic or equivalent alternative part will work, there might be an opportunity to save money and shorten delivery time.
Before you shop, check the bill of materials to see if it specifically calls out a particular brand name along with the part number. If no specific manufacturer’s name is listed, then you can typically use a generic alternative or equivalent product?. For more complete info, check out our July 27 blog for your 4 point checklist on determining if functional equivalents will work for your business.
For more information about MF Supply contact:
Robin Lieberman, President
robin@mfsupply.com
973-777-5411
Buyer’s Guide to One and done Keensert® Ordering
Posted: June 28, 2018 Filed under: DFARS, keensert, key-locking inserts, Mil-Spec, Supply chain - manufacturing, Uncategorized | Tags: keensert, key-locking insert, MS51830, ms51831, MS51832, supply chain Leave a comment
Your 5 point checklist to getting it right the first time
What is a Keensert®?
Keenserts® are solid bushing style inserts that are threaded on both the inside and the outside, and have wedges or “keys” attached at the top. They are generically called key-locking inserts, and are used to distribute loads and repair or strengthen threads against failures due to stripping, seizing or corrosion. They are commonly used in precision manufacturing and aerospace applications.
Although the name Keensert® is often used generically (like Band-Aid® or Kleenex®), Keensert® is the registered trademark of Huck Patents (its close cousin, the Keysert® is a registered trademark of Alcoa Fastening Systems.).
How do I simplify my buying process to get what I need to complete the job on time and right?
We are all familiar with that classic adage “Measure twice, cut once”. Nowhere is this more relevant than in the world of manufacturing. If you are involved in procurement, you are challenged with making sure you have the right parts available at the best price so your factory can deliver on time and on budget. Missing tools, incorrect paperwork and long delivery times can cause major headaches and negatively impact service levels.
Our goal is to help you make the Keensert buying process easier, which in turn will eliminate stress, reduce multiple shipments and potentially increase your profits. The result? Happier customers (and finance departments too)! So here it goes…..
- Make sure to order the correct part.
Due to the price, availability and high minimum order requirements of Huck or Alcoa branded Keensert® parts, using functional equivalents including Mil-Spec parts has become a common practice. Request that your supplier makes reference to the part number listed on your bill of materials on their sales order and packing slip. This will ensure you are getting the functional equivalent that you need.
If you are not ordering by part number, make sure to call out both the internal and external thread including the thread class (UNC, UNF, UNJ), the material and plating, and any special finish you need.
- Place blanket orders for your total project needs to get the best price and ensure availability of parts when you need them.
Most standard size non-locking miniature and thin wall / light weight Keenserts® are readily available off the shelf in 303 stainless steel or carbon steel. However, some locking style, nonstandard diameters, 4140 alloy, A286, heavy duty, extra heavy duty, solid and floating style Keenserts® are available only by special order and usually involve a long lead time. Make sure to get current price and delivery and order parts as early as possible. Many suppliers allow you to order now and ship later, which can prevent delivery delays.
If you have an ongoing project, calculate your total needs and place your order with staggered delivery dates. This will get you the best available pricing and ensure you have the parts when you need them. Remember, price breaks can start at as few as 100 pieces.
- Order (the correct) installation tools with Keenserts® for maximum efficiency.
Whereas most common size and material installation tools are readily available off the shelf, less popular sizes and materials might involve a lead time. Parent materials harder than RC30 or Anondized Aluminum may require that the tapped holes be broached for the keys, which requires the use of broach blades.
In addition, there are manual and power installation tools to choose from, so consult with your supplier on which tool is correct for your job. Note: manual tools work well for jobs up to 999 Keenserts®. For installations of 1000 Keenserts® or more, a pneumatic tool is recommended.
- Order the Correct drills and taps for proper installation
Although Keenserts® are installed with standard drills and taps (plus the installation tool and a hammer) each part has a specific hole/tap dimensional recommendation. The drills used are often oversized for the external thread size. When purchasing key-locking inserts, check with your production department to make sure you have everything you need for proper installation. Note: Drill is oversize see charts for proper dimensions.
Kits are handy to have in the shop and are available for most common sizes. These kits include 2+ Keenserts®, the associated drill, tap and manual installation tool along with instructions for correct installation.
- Request COC, MTRs, DFAR and all required paperwork on your RFQ and PO.
Since using functional equivalents including Mil-Spec parts is a common practice, make sure you have dotted your i’s and crossed your t’s when it comes to paperwork. Ask your supplier to reference the branded part number listed on your bill of materials on their COC and packing slip to make sure you are getting the functional equivalent that you need. In most cases, a Certificate of Conformance or a COC referencing the part number you ordered is all the paperwork you need. Certain aerospace customers need a complete Manufacturer’s Test Report (MTR) package including DFAR statement and passivation certs with full lot traceability. This might involve a fee, so include it in your RFQ. Whatever your requirement, include it on your Purchase Order to make sure you have what you need to satisfy your customer’s needs.
In summary, follow this handy 5 point guide when ordering Keenserts® and watch your costs decrease and your service levels soar!
For more information about MF Supply contact:
Robin Lieberman, President
robin@mfsupply.com
973-777-5411