Custom Made & Reworked Fasteners

When 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

MS16555 Dowel Pins in Stock

At MF Supply, we have a large selection of the hardware and protective equipment many industries need for their business. The product we want to highlight today is the MS16555 Dowel Pin.

Dowel Pin MS16555

This dowel pin is stainless steel, cylindrical, solid, and headless fastener, which is made right here in the United States.

Dowel Pin Uses

Dowel pins are broadly used in various applications, including aerospace, electrical motors, hydraulic equipment, instrumentation, and more.

They’re used as a hinge, shaft, or pivot, and are used to locate or hold parts together within a precision assembly or a fixture, often when things are moving within that assembly.

Dowel Pin Options


  • 416 or 400 series hardened stainless steel
  • Plain alloy steel
  • Phosphate finished alloy steel


Our dowel pins start as small as 1/16th diameter and go all the way up to over an inch in diameter with a variety of different platings.

Why Choose MF Supply for MS16555 Dowel Pins?

  • The MS16555 Dowel Pin is our most popular military spec fastener.
  • They are made in the USA and are DFAR compliant.
  • Certification paperwork is available.
  • We have extensive stock, in NJ and at our distribution centers, which means no delay in delivery.

Learn More About the MS16555 Dowel Pins

If you are interested in learning more about these dowel pins or any of our other fasteners or PPE, contact us today!

Buyer’s Guide to Self-Clinching Fasteners 2019


MF Supply continues to expand our offering of products available for purchase online. We are thrilled to offer Self-clinching fasteners available from stock that can be purchased on our website or by email, phone or fax. We are an authorized distributor for Captive Fasteners, a US based manufacturer since 1974, with a factory right here in our NJ backyard!

What are Self-clinching fasteners?

Self-clinching fasteners are generally classified as part of the electronic hardware or precision engineered fastener family and are not governed by IFI, ANSI or ASME standards. A self-clinching fastener, also known as press-fit or clinch style captive fastener, is a part that when pressed into a drilled, punched or machined hole, provides an economical method of joining sheet metal panel applications and is well-suited for use in printed circuit boards.

Self-clinching fasteners are used in many industries; both commercial and aerospace.

Self-clinching Fasteners available at MF Supply

MF Supply offers the full catalog of Captive branded fasteners & PEM® equivalents in inch & metric sizes. We have the following parts available for purchase online, in stock and ready to ship from our national distribution centers:

Additional Series available include, but are not limited to, floating, self-locking, blind-hole, flush, and broaching fasteners.


How do they work? 

Self-clinching fasteners work by displacing the host material around the mounting hole, causing it to cold flow into a specially designed annular recess. Knurls, serrated rings or ribs on the fastener hold them firmly in place. Self-clinching fasteners become an integral permanent part of the panel or frame and eliminate problems associated with loose hardware. Installation requires access to both sides of the panel and self-clinching fasteners may be installed using any parallel acting squeezing force.

What are the advantages of Self-Clinching fasteners?

Self-clinching fasteners provide strong thread in very thin material & offer high push out and torque out resistance. They take less space and require fewer assembly operations than caged or anchor nuts. They can be installed during fabrication or during final assembly and work well in applications when loose hardware wouldn’t be accessible.

Some of the key advantages include:

  • No special hole preparation, such as chamfering and deburring is required.
  • Low installed costs, fewer parts to handle, fewer assembly steps and less assembly time.
  • No retapping necessary after application.

Reverse side of metal sheet remains flush – no swaged rim protrusion.

What are the differences between branded fasteners like PEM & Captive and generic Self-clinching fasteners?

SelfClinchStudSelf-clinching hardware is frequently referred to by the OEM brand name PEM®. Captive Fastener is a USA based manufacturer and offers functional equivalents to PEM® branded self-clinching fasteners.  In addition to PEM® & Captive, there are a variety of manufacturers of self-clinching fasteners available in the marketplace including the major national catalog brands. Functional alternatives will be equivalent in form fit and function and offer similar performance.

To see if using alternative brands or functional equivalents will work for your business, refer to our handy guide.

We have also included a cross reference lookup table for PEM® product types vs. Captive product series below.

What information for I need for ordering? 

The easiest way to order is by manufacturer part number. If you don’t have one, you’ll need to specify fastener type & style, thread diameter & pitch, fastener length, material and plating. For example: a 10-32 X 3/8 Flush Head Self-Clinching Stud Steel Zinc plated can also be ordered as a PEM® FH-032-6, (or a PEM® FH-032-6-ZI as sometimes PEM® calls out the plating) or a Captive CH1032-6.  This part is also offered by a national catalog brand under part number 93580A166.

Additional Series available include, but are not limited to, floating, self-locking, blind-hole, flush, and broaching fasteners.

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

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

What the heck is Mil-spec DFARS? 2019



Welcome to our ongoing “What the heck is that” series, where we discuss some of the unique fasteners and electronic hardware that precision manufacturers use in the design and assembly of their products.  If you sell to the military either directly or indirectly, then you are probably aware of today’s topic: “DFARS” and “Mil-spec fasteners”.

What does Mil-spec mean anyway?

Before we get into the nitty gritty of DFARS, let’s discuss what makes a “Mil-spec” fastener.   Mil-spec is the informal name for the military standard the U.S. Department of Defense uses in the production of military equipment. Mil-spec fasteners are usually designated by an AN, MS, NAS or NASM prefix followed by a part number.  Each of these prefixes is an abbreviation: NAS stands for National Aerospace Standard and MS stands for Military Standard. For example, the MS24693C pictured above is a fastener produced according to military standards.

Mil-spec fasteners look a lot like their civilian cousins, but, these little guys are made to a specific standard that defines in detail, the screw’s attributes, including: dimensions, tensile strength, hardness, threads, drive type, material qualities and plating, just to name a few.  Mil-spec fasteners are even traceable by lot to designated manufacturers.  The government maintains a list of factories and suppliers who are qualified to manufacture and distribute Mil-spec fasteners.  These suppliers have met all the government’s requirements and pass the highest quality control standards. This designation is called the Qualified Suppliers List for Manufacturer’s [QSLM].

Who uses Mil-spec Fasteners?

Mil-spec fasteners are used by anyone manufacturing or servicing military equipment.  Often, the bill of materials calls for specific Mil-spec grade fasteners in accordance with a part number, drawing or procurement requirement.  Some of the most common uses of Mil-spec fasteners include aerospace and naval vessels.

Now, tell me about DFARS…

Almost a decade ago, the term “DFARS Compliant Material” came to the forefront for companies supplying parts and services to the government. The original Federal Acquisition Regulation (FAR) clause 252.225-7014 specified “A Preference for Domestic Specialty Metals.”  What that means in our world is that for fasteners to be DFARS compliant, the metal used to fabricate them must be melted or manufactured in the United States or a qualifying country.

The Defense Federal Acquisition Regulation Supplement declares the following:

  • Provides specific acquisition regulations that must be followed in the procurement process for goods and services for the Department of Defense and its contactors.
  • FAR 252.225-7014 specifies “A Preference for Domestic Specialty Metals” in the manufacturing of fasteners.  Berry Act, Buy American.
  • The Specialty metals must be melted and manufactured in the United States or a “Qualifying country.”

What is a Qualifying Country?

Qualifying country” means a country with a reciprocal defense procurement memorandum of understanding or international agreement with the United States in which both countries agree to remove barriers to purchases of supplies produced in the other country or services performed by sources of the other country, and the memorandum or agreement complies, where applicable, with the requirements of section 36 of the Arms Export Control Act (22 U.S.C. 2776) and with 10 U.S.C. 2457.

Qualifying countries include the following 27: Australia, Austria, Belgium, Canada, Czech Republic, Denmark, Egypt, Estonia, Finland, France, Germany, Greece, Israel, Italy, Japan, Latvia, Luxembourg, Netherlands, Norway, Poland, Portugal, Slovenia, Spain, Sweden, Switzerland, Turkey, United Kingdom of Great Britain and Northern Ireland.

To keep up to date with DFARs requirements, visit

What is a Specialty Metal?

Title 48 – Federal Acquisition Regulations System, 252.225-7014 Preference for domestic specialty metals.








Specialty Metals Include:

  • Stainless steel
  • High alloy steel like Grade-BD
  • Cobalt Chrome Alloys or Grade 5 Chromium steel with high chromium content
  • Nickel Alloys
  • Titanium

Aluminum, Carbon Steel & Copper Alloys are not specialty metals and cannot be DFARS.

What is the difference between Domestic & DFARS?

This is a great question!  There are 3 main factors used to determine the country where a fastener is made and how they are classified.  1) The origin of the metal 2) the country of melt and 3) the country of manufacture.

DFARs only related to specialty metals, and the country of melt & manufacture.  Check with your customer before making any assumptions about what “domestic” means to them.  100% Domestic (metal origin, melt & manufacture) is becoming harder and harder to find. Many products are not available off the shelf and are “made to order” if DFARS or domestic is needed. This will involve a lead time and may have a minimum lot charge.

Lessons Learned: Considerations when purchasing MS24693C or other Mil-spec DFARs fasteners

  • Always ask for “full certifications”.  This includes part name, part description, date of manufacture, lot number, chemical composition of material, and treatment of material including plating or passivation.
  • At point of purchase, make sure the screws are DFARS.  If you do not specifically ask for DFARS-compliant screws, you might receive screws that don’t meet the DFARS requirements, in which case, they won’t meet military standards.  We’ve learned this the hard way so hopefully you don’t have to!