Industries / Mil-Spec Fasteners

Mil-Spec Fasteners

RC Fasteners & Components maintains an extensive inventory of Mil-Spec fasteners manufactured to strict requirements for mission-critical applications. Our selection includes AN, MS, and NAS-designated hardware to meet your needs across different military sectors, providing reliable, durable solutions. Additionally, we can source hard-to-find components with the applicable materials and certifications to meet your needs.
To discuss your requirements for military spec fasteners, contact RC Fasteners & Components.

Mil-Spec Fastener Features

Military spec fasteners are hardware components manufactured to strict standards set by the U.S. Department of Defense. They are precision-engineered to guarantee reliability, strength, and safety under extreme operational stress, providing extreme durability, corrosion resistance, and full traceability. To be designated as Mil-Spec, these fasteners must be manufactured and controlled to meet defined requirements for the following factors:
  • Material
  • Dimensions
  • Mechanical Properties
  • Coatings and Finishes
  • Thread Requirements
  • Performance
  • Quality and Consistency
When looking for military spec fasteners, you may encounter AN, MS, or NAS prefixes, which align with different standards for specific applications or use cases.
Standard Definition Primary Use and Characteristics
AN Army-Navy Aeronautical Standard A legacy standard that unifies old Army and Navy specifications; typically found on older drawings and manuals for replacement bolts and screws.
MS Military Standard The modern successor to AN, this standard covers a broad range of defense hardware, including bolts, nuts, washers, and screws.
NAS National Aerospace Standard A high-precision standard that is maintained by the Aerospace Industries Association (AIA); engineered for extreme, flight-critical applications, featuring tighter dimensional tolerances and greater strength than AN/MS.
 

Types of Military Spec Fasteners

RC Fasteners & Components supplies a broad range of fasteners manufactured to military and aerospace specifications, including Mil-Spec nuts, locknuts, nut plates, screws, socket head cap screws, set screws, bolts, and specialty fasteners. We source our military spec fasteners from leading manufacturers such as ALCOA, FLEXLOC, GREER, MACLEAN-ESNA, SPS, and more.

Mil-Spec Nuts and Locknuts

We supply standard nuts, self-locking nuts, and specification-controlled nut configurations for military applications, including the following products:
 
  • AN310
  • AN315
  • AN316
  • AN320
  • MS21042
  • MS21047
  • MS21059
  • MS21060
  • MS21062
  • MS21071
  • MS27130
  • MS35650
  • MS35659
  • MS33737
 

Mil-Spec Nut Plates

Mil-spec nut plates include fixed, floating, and self-locking nut plate configurations where applicable. Our inventory of nut plates for military applications includes:
 
  • MS21052
  • MS21055
  • MS21059
  • MS21061
  • MS21069
  • MS21073
  • MS21075
  • MS21078
 

Aerospace and Mil-Spec Bolts

For aerospace and military applications, Mil-Spec bolts are used in structural, equipment, vehicle, aviation, and other demanding applications. The following aerospace and Mil-Spec bolts are available:
 
  • AN3
  • AN4
  • AN5
  • AN6
  • AN7
  • AN8
  • AN23
  • AN24
  • AN173
  • AN174
  • NAS6203
  • NAS6204
  • NAS6703
  • NAS6704
 

Mil-Spec Socket Head Cap Screws

Manufactured to applicable military or aerospace specifications, Mil-Spec socket head cap screws are a high-strength fastener solution. Our options include:
 
  • MS16995
  • MS16996
  • MS16997
  • MS16998
  • NAS1351
  • NAS1352
 

Mil-Spec Set Screws

Including socket set screws and other specification-controlled set screw configurations, we offer Mil-Spec set screw solutions, such as:
  • AN565
  • MS51021
  • MS51029

Mil-Spec Washers

Our selection of Mil-Spec washers includes flat washers, lock washers, and other specification-controlled washer products to support aerospace and military applications:
  • AN960
  • AN970
  • MS20002
  • MS35333
  • MS35335
  • MS35338
  • NAS620
  • NAS1149

Mil-Spec Machine Screws and Additional Screws

With a wide range of specification-controlled machine screws and other screw-type fastener styles, we offer solutions for equipment, panels, assemblies, and other military and aerospace applications through the following products:
 
  • MS24673
  • MS24674
  • MS24677
  • MS24678
  • MS35190
  • MS35191
  • MS35206
  • MS35207
  • MS35214
  • MS35215
  • MS35265
  • MS35266
  • MS35275
  • MS35276
  • MS35333
  • MS35335
  • MS35489
  • MS51957
  • MS51958
  • MS51959
  • MS51963
  • MS51964
  • MS51965
 

Additional Mil-Spec Part Numbers

Looking for a specific Mil-Spec fastener not listed above? RC Fasteners & Components offers additional AN, MS, and NAS-designated hardware to support your military and aerospace applications.

View Additional Mil-Spec Part Numbers (PDF)

Mil-Spec Rivets

Offering permanent mechanical fastener solutions, our inventory includes solid and specialty rivets manufactured to applicable aerospace and military specifications to meet your needs.

Specialty and Other Mil-Spec Hardware

In addition to an extensive inventory of nuts, washers, screws, and other standard Mil-Spec fasteners, RC Fasteners & Components also supplies pins, clamps, retaining hardware, and specialty components made to aerospace and military specifications.

 

Applications of Mil-Spec Fasteners

We provide a range of military spec fasteners to support various applications across military and aerospace markets. These fasteners are manufactured to strict, standardized requirements set by the U.S. Department of Defense for maximum reliability in mission-critical applications, including but not limited to the following:
  • Defense
  • Military Equipment
  • Aerospace and Aviation
  • Ground Vehicles
  • Naval and Marine Equipment
  • Electronics and Electrical Equipment

Custom and Specialty Military Spec Fastener Solutions

If you don’t see the fasteners you need here, RC Fasteners & Components can help you find custom fasteners and hard-to-find parts that meet critical military and aerospace specifications. We can source made-to-print fasteners with short-run requirements in alloy steel, 302 stainless steel, 316 stainless steel, and A286 stainless steel for your military and aerospace manufacturing projects.

Get Mil-Spec Fasteners from the Phoenix Fastener Superstore

With a broad fastener inventory, RC Fasteners & Components is a one-stop source for reliable, high-quality fasteners. Our selection of military spec fasteners includes everything from nuts, bolts, and screws to rivets and specialty hardware, all made to critical specifications for exceptional reliability in demanding applications.

Committed to top-quality products at competitive, honest prices, we supply solutions from ISO 9001-certified manufacturers to meet your needs, with ongoing customer support to ensure your satisfaction. Contact us for more information about specialty Mil-Spec fastener solutions or get a quick quote to begin your order.
For repeat and volume customers, please call or request a quote.