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 401–450 of 1,345 products

SKU	ID	OD	Thickness	Material	Drawing	Quantity
AN961-8T	ID 0.174	OD 0.375	Thickness 0.032	Material Not available	Drawing NASM961 REV 2	Quantity
AN970-10	ID 0.64	OD 2.375	Thickness 0.125	Material Not available	Drawing NASM970 REV 2	Quantity
AN970-3	ID 0.203	OD 0.875	Thickness 0.063	Material Not available	Drawing NASM970 REV 2	Quantity
AN970-4	ID 0.265	OD 1.125	Thickness 0.063	Material Not available	Drawing NASM970 REV 2	Quantity
AN970-4C	ID 0.265	OD 1.125	Thickness 0.063	Material Not available	Drawing NASM970 REV 2	Quantity
AN970-5	ID 0.328	OD 1.375	Thickness 0.063	Material Not available	Drawing NASM970 REV 2	Quantity
AN970-6	ID 0.39	OD 1.625	Thickness 0.063	Material Not available	Drawing NASM970 REV 2	Quantity
AN970-7	ID 0.453	OD 1.812	Thickness 0.109	Material Not available	Drawing NASM970 REV 2	Quantity
AN970-8	ID 0.515	OD 2.0	Thickness 0.109	Material Not available	Drawing NASM970 REV 2	Quantity
AN970-9	ID 0.578	OD 2.188	Thickness 0.125	Material Not available	Drawing NASM970 REV 2	Quantity
MS14151-1	ID 0.144	OD 0.47	Thickness 0.02	Material Not available	Drawing NASM14151 REV 1	Quantity
MS14151-2	ID 0.198	OD 0.6	Thickness 0.02	Material Not available	Drawing NASM14151 REV 1	Quantity
MS14151-3	ID 0.255	OD 1.07	Thickness 0.02	Material Not available	Drawing NASM14151 REV 1	Quantity
MS14151-4	ID 0.318	OD 1.07	Thickness 0.02	Material Not available	Drawing NASM14151 REV 1	Quantity
MS14151-5	ID 0.38	OD 1.07	Thickness 0.02	Material Not available	Drawing NASM14151 REV 1	Quantity
MS14151-6	ID 0.167	OD 0.54	Thickness 0.02	Material Not available	Drawing NASM14151 REV 1	Quantity
MS15795-401	ID 0.078	OD 0.188	Thickness 0.016	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-402	ID 0.094	OD 0.25	Thickness 0.016	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-403	ID 0.125	OD 0.25	Thickness 0.017	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-404	ID 0.125	OD 0.312	Thickness 0.025	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-405	ID 0.156	OD 0.312	Thickness 0.027	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-406	ID 0.156	OD 0.375	Thickness 0.036	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-407	ID 0.188	OD 0.375	Thickness 0.036	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-408	ID 0.219	OD 0.438	Thickness 0.036	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-409	ID 0.25	OD 0.562	Thickness 0.051	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-410	ID 0.281	OD 0.625	Thickness 0.051	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-411	ID 0.312	OD 0.734	Thickness 0.051	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-412	ID 0.344	OD 0.688	Thickness 0.051	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-413	ID 0.375	OD 0.875	Thickness 0.064	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-414	ID 0.406	OD 0.812	Thickness 0.051	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-415	ID 0.438	OD 1.0	Thickness 0.064	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-416	ID 0.469	OD 0.922	Thickness 0.051	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-417	ID 0.5	OD 1.25	Thickness 0.064	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-418	ID 0.531	OD 1.062	Thickness 0.074	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-419	ID 0.562	OD 1.375	Thickness 0.086	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-420	ID 0.656	OD 1.312	Thickness 0.074	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-421	ID 0.688	OD 1.75	Thickness 0.108	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-422	ID 0.812	OD 1.469	Thickness 0.108	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-423	ID 0.812	OD 2.0	Thickness 0.122	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-424	ID 0.938	OD 1.75	Thickness 0.108	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-425	ID 0.938	OD 2.25	Thickness 0.136	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-426	ID 1.062	OD 2.0	Thickness 0.108	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-427	ID 1.062	OD 2.5	Thickness 0.136	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-428	ID 1.25	OD 2.75	Thickness 0.136	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-429	ID 1.375	OD 3.0	Thickness 0.136	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-430	ID 1.5	OD 3.25	Thickness 0.153	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-431	ID 1.625	OD 3.5	Thickness 0.153	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-432	ID 1.75	OD 3.75	Thickness 0.153	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-433	ID 1.875	OD 4.0	Thickness 0.153	Material Monel	Drawing NASM15795 REV 3	Quantity
MS15795-434	ID 2.0	OD 4.25	Thickness 0.153	Material Monel	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