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

Q: 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 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.

Q: What standards do your military washers adhere to?

Superior Washer manufactures to three primary standard families: AN (Aeronautical Standards), MS (Military Standards), and NAS (National Aerospace Standards). Specific part families include AN901, AN960, AN961, AN970, MS14151, MS15795, MS16212, MS20002, MS21206, MS21299, MS27183, MS51412, MS51496, MS51859, MS91124, MS9321, MS9549, NAS1149, NAS1515, NAS1587, and NAS620.

Q: Are your military washers made in the USA?

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

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 1251–1300 of 1,345 products

SKU	ID	OD	Thickness	Drawing	Quantity
NAS1587-16	ID 1.01	OD 1.625	Thickness 0.062	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-18	ID 1.135	OD 1.875	Thickness 0.062	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-20	ID 1.26	OD 2.125	Thickness 0.062	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-3	ID 0.192	OD 0.469	Thickness 0.032	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-3L	ID 0.192	OD 0.469	Thickness 0.016	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-4	ID 0.252	OD 0.531	Thickness 0.062	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-4C	ID 0.0	OD 0.0	Thickness 0.0	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-4L	ID 0.252	OD 0.531	Thickness 0.032	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-5	ID 0.315	OD 0.593	Thickness 0.062	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-5L	ID 0.315	OD 0.593	Thickness 0.032	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-6	ID 0.378	OD 0.687	Thickness 0.062	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-6L	ID 0.378	OD 0.687	Thickness 0.031	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-7	ID 0.441	OD 0.781	Thickness 0.062	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-8	ID 0.504	OD 0.875	Thickness 0.062	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-8L	ID 0.504	OD 0.875	Thickness 0.031	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-9	ID 0.568	OD 0.968	Thickness 0.062	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-9C	ID 0.568	OD 0.968	Thickness 0.078	Drawing REV 5 STAMPED W/PN	Quantity
NAS1587-9L	ID 0.568	OD 0.968	Thickness 0.032	Drawing REV 5 STAMPED W/PN	Quantity
NAS620-0	ID 0.063	OD 0.099	Thickness 0.016	Drawing REV 8	Quantity
NAS620-10	ID 0.195	OD 0.354	Thickness 0.063	Drawing REV 8	Quantity
NAS620-10L	ID 0.195	OD 0.354	Thickness 0.032	Drawing REV 8	Quantity
NAS620-2	ID 0.089	OD 0.149	Thickness 0.016	Drawing REV 8	Quantity
NAS620-3	ID 0.102	OD 0.18	Thickness 0.032	Drawing REV 8	Quantity
NAS620-3L	ID 0.102	OD 0.18	Thickness 0.016	Drawing REV 8	Quantity
NAS620-4	ID 0.115	OD 0.209	Thickness 0.032	Drawing REV 8	Quantity
NAS620-416	ID 0.255	OD 0.468	Thickness 0.063	Drawing REV 8	Quantity
NAS620-416L	ID 0.255	OD 0.468	Thickness 0.032	Drawing REV 8	Quantity
NAS620-4L	ID 0.115	OD 0.209	Thickness 0.016	Drawing REV 8	Quantity
NAS620-5	ID 0.128	OD 0.238	Thickness 0.032	Drawing REV 8	Quantity
NAS620-5L	ID 0.128	OD 0.238	Thickness 0.016	Drawing REV 8	Quantity
NAS620-6	ID 0.143	OD 0.267	Thickness 0.032	Drawing REV 8	Quantity
NAS620-6L	ID 0.143	OD 0.267	Thickness 0.016	Drawing REV 8	Quantity
NAS620-8	ID 0.169	OD 0.304	Thickness 0.032	Drawing REV 8	Quantity
NAS620-8L	ID 0.169	OD 0.304	Thickness 0.016	Drawing REV 8	Quantity
NAS620A0	ID 0.063	OD 0.099	Thickness 0.016	Drawing REV 8	Quantity
NAS620A10	ID 0.195	OD 0.354	Thickness 0.063	Drawing REV 8	Quantity
NAS620A10L	ID 0.195	OD 0.354	Thickness 0.032	Drawing REV 8	Quantity
NAS620A2	ID 0.089	OD 0.149	Thickness 0.016	Drawing REV 8	Quantity
NAS620A3	ID 0.102	OD 0.18	Thickness 0.032	Drawing REV 8	Quantity
NAS620A3L	ID 0.102	OD 0.18	Thickness 0.016	Drawing REV 8	Quantity
NAS620A4	ID 0.115	OD 0.209	Thickness 0.032	Drawing REV 8	Quantity
NAS620A416	ID 0.255	OD 0.468	Thickness 0.063	Drawing REV 8	Quantity
NAS620A416L	ID 0.255	OD 0.468	Thickness 0.032	Drawing REV 8	Quantity
NAS620A4L	ID 0.115	OD 0.209	Thickness 0.016	Drawing REV 8	Quantity
NAS620A5	ID 0.128	OD 0.238	Thickness 0.032	Drawing REV 8	Quantity
NAS620A5L	ID 0.128	OD 0.238	Thickness 0.016	Drawing REV 8	Quantity
NAS620A6	ID 0.143	OD 0.267	Thickness 0.032	Drawing REV 8	Quantity
NAS620A6L	ID 0.143	OD 0.267	Thickness 0.016	Drawing REV 8	Quantity
NAS620A8	ID 0.169	OD 0.304	Thickness 0.032	Drawing REV 8	Quantity
NAS620A8L	ID 0.169	OD 0.304	Thickness 0.016	Drawing REV 8	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.

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