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 451–500 of 1,345 products

SKU	ID	OD	Thickness	Material	Drawing	Quantity
MS15795-435	ID 2.125	OD 4.5	Thickness 0.153	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-436	ID 2.375	OD 4.75	Thickness 0.193	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-437	ID 2.625	OD 5.0	Thickness 0.21	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-438	ID 2.875	OD 5.25	Thickness 0.228	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-439	ID 3.125	OD 5.5	Thickness 0.249	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-440	ID 0.604	OD 1.469	Thickness 0.09	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-441	ID 0.188	OD 0.438	Thickness 0.036	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-442	ID 0.219	OD 0.5	Thickness 0.036	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-443	ID 0.594	OD 1.469	Thickness 0.09	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-444	ID 0.266	OD 0.688	Thickness 0.046	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-445	ID 0.281	OD 0.734	Thickness 0.056	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-448	ID 0.406	OD 0.625	Thickness 0.051	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-449	ID 0.5	OD 0.875	Thickness 0.058	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-501	ID 0.078	OD 0.188	Thickness 0.016	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-502	ID 0.094	OD 0.25	Thickness 0.016	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-503	ID 0.125	OD 0.25	Thickness 0.017	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-504	ID 0.125	OD 0.312	Thickness 0.025	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-505	ID 0.156	OD 0.312	Thickness 0.027	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-506	ID 0.156	OD 0.375	Thickness 0.036	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-507	ID 0.188	OD 0.375	Thickness 0.036	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-508	ID 0.219	OD 0.438	Thickness 0.036	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-509	ID 0.25	OD 0.562	Thickness 0.051	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-510	ID 0.281	OD 0.625	Thickness 0.051	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-511	ID 0.312	OD 0.734	Thickness 0.051	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-512	ID 0.344	OD 0.688	Thickness 0.051	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-513	ID 0.375	OD 0.875	Thickness 0.064	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-514	ID 0.406	OD 0.812	Thickness 0.051	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-515	ID 0.438	OD 1.0	Thickness 0.064	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-516	ID 0.469	OD 0.922	Thickness 0.051	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-517	ID 0.5	OD 1.25	Thickness 0.064	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-518	ID 0.531	OD 1.062	Thickness 0.074	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-519	ID 0.562	OD 1.375	Thickness 0.086	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-520	ID 0.656	OD 1.312	Thickness 0.074	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-521	ID 0.688	OD 1.75	Thickness 0.108	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-522	ID 0.812	OD 1.469	Thickness 0.108	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-523	ID 0.812	OD 2.0	Thickness 0.122	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-524	ID 0.938	OD 1.75	Thickness 0.108	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-525	ID 0.938	OD 2.25	Thickness 0.136	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-526	ID 1.062	OD 2.0	Thickness 0.108	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-527	ID 1.062	OD 2.5	Thickness 0.136	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-528	ID 1.25	OD 2.75	Thickness 0.136	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-529	ID 1.375	OD 3.0	Thickness 0.136	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-530	ID 1.5	OD 3.25	Thickness 0.153	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-531	ID 1.625	OD 3.5	Thickness 0.153	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-532	ID 1.75	OD 3.75	Thickness 0.153	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-533	ID 1.875	OD 4.0	Thickness 0.153	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-534	ID 2.0	OD 4.25	Thickness 0.153	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-535	ID 2.125	OD 4.5	Thickness 0.153	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-536	ID 2.375	OD 4.75	Thickness 0.193	Material Copper	Drawing NASM15795 REV 3	Quantity
MS15795-537	ID 2.625	OD 5.0	Thickness 0.21	Material Copper	Drawing NASM15795 REV 3	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