Ultimate Guide: Inch, Metric, and Mil-Spec Precision Shoulder Screws Cross Reference Charts and Guide

At MF Supply, we spend a lot of time sourcing hard to find, back ordered, expensive, or out-of-stock OEM hardware brands. We do this in order to save money and to reduce long lead times for our customers, without sacrificing quality. One of our core competencies is crossing brand names to functionally equivalent parts that maybe Mil-spec, alternative brands or generic parts.

What Is a Functional Equivalent Fastener?

In the fastener industry, a functional equivalent fastener is a component/part that matches a brand-name product in form, fit, and function, including material and plating specifications, but is produced by a different manufacturer. As a result, the industrial marketplace features a myriad of fasteners and components that are registered under various trademark brands, but that offer the same functionality. This, in turn, allows you to achieve the same product performance and quality desired at a potential lower cost and with shorter lead times than you would get with fasteners from well know or expensive brands.

Does My OEM Brand Have A Functional Equivalent or Alternative Fastener?

Many OEM brands available in the industry today have generic functional equivalents or alternatives. Below is a comprehensive list of popular brand names that show up quite often in the fasteners space and that have generic equivalent or alternative options to their OEM branded products:

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 Precision Shoulder Screws Have Functional Equivalents?

Yes! Precisions shoulder screws, also known in the industry as just shoulder screws or tight tolerance shoulder screws, do have functional equivalents. In fact, one surefire way to save money and shorten delivery time is to cross the OEM branded precision shoulder screw on your bill of materials to a functional equivalent.

Popular brands in the precision shoulder screws space include: Amatom, Cambion, Concord, Globe, HH Smith, Keystone, Lyn-tron, Misumi, Pic Design, RAF, and WM Berg. A comprehensive selection of Precision Shoulder Screws is also offered by McMaster-Carr, MSC, and Grainger.

Let’s take, for example, the following inch/imperial sized precision shoulder screw: 3/16” shoulder diameter x 1” long x 8-32 thread in SS18-8 (300 Series) with a hex-socket drive. This shoulder screw is offered by the seven brands listed below under the following part numbers:

• Grainger: 6JY20
• Lyn-tron: SS7431-00
• McMaster-Carr: 94035A208
• MSC Industrial: 67313726
• Pic Design: 4423
• RAF: 6931-SS
• WM Berg: PZ-14-3

You can also locate precision shoulder screws by Mil-Spec numbers, which include MS51575 and MS51576; all of which are DFARS compliant with full paperwork/documentation. The above mentioned shoulder screw or part, for instance, is equivalent to a Mil-Spec MS51576-14.

At MF Supply, we offer an extensive cross-reference guide to help you discover the ideal alternative for your requirements. Explore our most popular precision shoulder screws cross reference charts below to find functional equivalents to your OEM-branded products!

Precision Shoulder Screws Cross-Reference Charts: Find OEM Brands and Functional Equivalents

Precision Inch Shoulder Screws with Hex & Slotted Drives in 416 Series Stainless Steel – Cross Reference Charts

Precision inch hex socket shoulder screws and precision inch slotted shoulder screws are available in 416 Series Stainless Steel. Stock sizes include 1/8 through 1/2 diameters.

Precision Inch Shoulder Screws with Hex & Slotted Drives in 300 Series Stainless Steel – Cross Reference Charts

Precision inch hex socket shoulder screws and precision inch slotted shoulder screws are also available in 300 Series Stainless Steel. Stock sizes include 1/8 through 1/2 diameters.

Precision Metric Shoulder Screws with Hex Drive in 18-8, 300 & 416 Series Stainless Steel – Cross Reference Charts

Precision metric hex socket shoulder screws are available in 18-8, 300 & 416 Series Stainless Steel. Stock sizes include M4 through M12 diameters.

Precision Metric Shoulder Screws with Slotted Drive in 18-8, 300 & 416 Series Stainless Steel – Cross Reference Charts

Precision metric slotted socket shoulder screws are available in 18-8, 300 & 416 Series Stainless Steel. Stock sizes include M4 through M12 diameters.

Precision Mil Spec Shoulder Screws with Hex Drive in 300 Series Stainless Steel – MS51576 – Cross Reference Charts

Precision Mil-Spec hex socket shoulder screws, MS51576, are available in 300 Series Stainless Steel. Stock sizes include 4-40 through 3/8-16 diameters.

Precision Mil Spec Shoulder Screws with Slotted Drive in 300 Series Stainless Steel – MS51575 – Cross Reference Charts

Precision Mil-Spec slotted socket shoulder screws, MS51575, are available in 300 Series Stainless Steel. Stock sizes include 1/8 through 1/2 diameters.

Using functional equivalents, including generics and other OEM brands’ versions of precision shoulder screws, is a practice smart manufacturer’s often use to save money and shorten lead times!

Precision Shoulder Screws at MF Supply

MF Supply is a leading supplier of precision shoulder screws including major brands and equivalents. We stock a huge inventory including parts that are commercial and mil-spec. Our Mil-Spec products are DFAR compliant with COC and full certifications available upon request.

Precision shoulder screws are available in imperial, mil-spec, and metric sizes, and in type 18-8/303, 300 Stainless Steel and in 416 Stainless Steel – 316 Stainless Steel, Alloy and other exotic materials are also available for special order.

Product Lines Include:

• Inch Precision Shoulder Screws
• Metric Precision Shoulder Screws
• Mil-Spec Precision Shoulder Screws – MS51575 & MS51576

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.

• 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. 
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