Home | Military Washers & Mil-Spec Flat Washers - AN, MS, NAS Standards

Military Washers & Mil-Spec Flat Washers - AN, MS, NAS Standards

Superior Washer & Gasket Corp is a trusted manufacturer of mil-spec washers for defense, aerospace, and government applications. Our military washers-including military flat washers, mil spec flat washers, and milspec washers-are produced to exacting AN, MS, and NAS standards, ensuring optimal performance and interchangeability in mission-critical assemblies.

As an ISO 9001:2015 certified company, we implement a rigorous Quality Management System (QMS) regularly audited for compliance. We provide full material certifications and DFARS compliance documentation. All military grade washers and military washers are manufactured in the U.S.A. from qualified materials.

  • Mil-spec washers to AN, MS, and NAS standards
  • DFARS-compliant materials and documentation
  • Material certifications available
  • ISO 9001:2015 certified QMS
  • 100% U.S. manufactured

Showing 901–950 of 1,345 products

SKU ID OD Thickness Material Drawing Quantity

NAS1149C0563R

ID 0.328
OD 0.562
Thickness 0.063
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0616B

ID 0.39
OD 0.625
Thickness 0.016
Material 301 SS 1/4 HD AMS5517
Drawing REV 7
Quantity

NAS1149C0616R

ID 0.39
OD 0.625
Thickness 0.016
Material 301 SS 1/4 HD AMS5517
Drawing REV 7
Quantity

NAS1149C0632B

ID 0.39
OD 0.625
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0632R

ID 0.39
OD 0.625
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0663B

ID 0.39
OD 0.625
Thickness 0.063
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0663R

ID 0.39
OD 0.625
Thickness 0.063
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0716B

ID 0.453
OD 0.75
Thickness 0.016
Material 301 SS 1/4 HD AMS5517
Drawing REV 7
Quantity

NAS1149C0716R

ID 0.453
OD 0.75
Thickness 0.016
Material 301 SS 1/4 HD AMS5517
Drawing REV 7
Quantity

NAS1149C0732B

ID 0.453
OD 0.75
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0732R

ID 0.453
OD 0.75
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0763B

ID 0.453
OD 0.75
Thickness 0.063
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0763R

ID 0.453
OD 0.75
Thickness 0.063
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0816R

ID 0.515
OD 0.875
Thickness 0.016
Material 301 SS 1/4 HD AMS5517
Drawing REV 7
Quantity

NAS1149C0832B

ID 0.515
OD 0.875
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0832R

ID 0.515
OD 0.875
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0863B

ID 0.515
OD 0.875
Thickness 0.063
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0863R

ID 0.515
OD 0.875
Thickness 0.063
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0916B

ID 0.578
OD 1.062
Thickness 0.016
Material 301 SS 1/4 HD AMS5517
Drawing REV 7
Quantity

NAS1149C0916R

ID 0.578
OD 1.062
Thickness 0.016
Material 301 SS 1/4 HD AMS5517
Drawing REV 7
Quantity

NAS1149C0932B

ID 0.578
OD 1.062
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0932R

ID 0.578
OD 1.062
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0963B

ID 0.578
OD 1.062
Thickness 0.063
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0963R

ID 0.578
OD 1.062
Thickness 0.063
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1032R

ID 0.64
OD 1.188
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1232R

ID 0.765
OD 1.312
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1290B

ID 0.765
OD 1.312
Thickness 0.09
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1290R

ID 0.765
OD 1.312
Thickness 0.09
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1416R

ID 0.89
OD 1.5
Thickness 0.016
Material 301 SS 1/4 HD AMS5517
Drawing REV 7
Quantity

NAS1149C1432R

ID 0.89
OD 1.5
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1490B

ID 0.89
OD 1.5
Thickness 0.09
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1490R

ID 0.89
OD 1.5
Thickness 0.09
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1632B

ID 1.015
OD 1.75
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1632R

ID 1.015
OD 1.75
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1690B

ID 1.015
OD 1.75
Thickness 0.09
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1690R

ID 1.015
OD 1.75
Thickness 0.09
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1732B

ID 1.078
OD 1.812
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1732R

ID 1.078
OD 1.812
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1790R

ID 1.078
OD 1.812
Thickness 0.09
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1832R

ID 1.14
OD 1.875
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C1890R

ID 1.14
OD 1.875
Thickness 0.09
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C2032R

ID 1.265
OD 2.0
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C2090R

ID 1.265
OD 2.0
Thickness 0.09
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C2190R

ID 1.328
OD 2.062
Thickness 0.09
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C2216R

ID 1.39
OD 2.125
Thickness 0.016
Material 301 SS 1/4 HD AMS5517
Drawing REV 7
Quantity

NAS1149C2432R

ID 1.515
OD 2.25
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C2490R

ID 1.515
OD 2.25
Thickness 0.09
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C2690R

ID 1.64
OD 2.375
Thickness 0.09
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C3690R

ID 2.265
OD 3.0
Thickness 0.09
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149CN016R

ID 0.068
OD 0.188
Thickness 0.016
Material 301 SS 1/4 HD AMS5517
Drawing REV 7
Quantity

As a leading washer manufacturer, we produce military washers according to precise standards and specifications. We are an ISO 9001:2015 certified company and implement, maintain, and adhere to a total Quality Management System (QMS) that is regularly audited to guarantee compliance and excellence. Our commitment to quality ensures we deliver products that meet rigorous industry requirements, including: • NAS: National Aerospace Standards • MS: Military Standards • AN: Aeronautical Standards We can provide material certifications and DFARS compliance. We proudly assure that all of the products we offer, from standard washers to custom washers, are manufactured here in the U.S.A.


Military Washers & Mil-spec Washers FAQ

Are military washers and mil-spec washers the same thing?

Yes. "Military washer," "mil-spec washer," "milspec washer," and "military flat washer" all refer to washers manufactured to meet documented military or aerospace procurement standards, such as AN (Aeronautical Standard), MS (Military Standard), or NAS (National Aerospace Standard). The terms are used interchangeably in defense and aerospace procurement. What matters is that the part number traces back to a published specification defining exact dimensions, material, and finish requirements.

What standards do your military washers adhere to?

Superior Washer manufactures to three primary military and aerospace standard families: AN (Aeronautical Standards), MS (Military Standards), and NAS (National Aerospace Standards). Within those families we produce to specific drawing numbers including AN901, AN960, AN961, AN970, MS14151, MS15795, MS16212, MS20002, MS21206, MS21299, MS27183, MS51412, MS51496, MS51859, MS91124, MS9321, MS9549, NAS1149, NAS1515, NAS1587, and NAS620.

What is ISO 9001:2015 and why does it matter for military washers?

ISO 9001:2015 is the internationally recognized standard for Quality Management Systems (QMS). It requires a manufacturer to document, implement, and continuously improve processes that ensure products consistently meet customer and regulatory requirements. For military and aerospace procurement, ISO 9001:2015 certification signals that our manufacturing and inspection processes are regularly audited by an independent third party, in our case, DNV, confirming compliance. All Superior Washer military products are manufactured under this certified QMS.

Are you DFARS compliant?

Yes. We provide DFARS compliance documentation for our military washers. However, DFARS specialty metal restrictions do not apply to all materials. Many of our most common washer materials including 1008/1010 and 1020 low carbon steel, brass alloy 260, copper alloy 110, aluminum, and nylon are exempt from DFARS specialty metal requirements and are commercially available without restriction. Materials that do fall under DFARS specialty metal rules (such as stainless steel, titanium, and nickel alloys) are sourced from the United States or qualifying countries. Material certifications and DFARS compliance documentation are available upon request.

Are your military washers made in the USA?

Yes. All military washers we offer are manufactured in the United States at our facilities in Hauppauge, NY and Rock Hill, SC. Our CAGE codes are 1L160 (NY) and 4WUG7 (SC).

Can you provide material certifications?

Yes. Full material certifications are available for all military washers. These certifications provide traceability from raw material to finished part, supporting government and prime contractor procurement requirements.

Do you offer custom or non-standard military washers?

Yes. While our catalog covers the most common mil-spec part numbers in stock, we also produce custom washers to special dimensions or materials. Contact us for a quote on non-catalog configurations.

How do I request a quote for military washers?

Use the Quick Quote form on our website or call our NY office at (631) 273-8282 or our SC office at (803) 366-3250. Include the part number, quantity, and any certification requirements and we will respond promptly.