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 701–750 of 1,345 products

SKU	ID	OD	Thickness	Drawing	Quantity
MS27183-11	ID 0.312	OD 0.734	Thickness 0.051	Drawing REV L	Quantity
MS27183-12	ID 0.344	OD 0.688	Thickness 0.051	Drawing REV L	Quantity
MS27183-13	ID 0.375	OD 0.875	Thickness 0.064	Drawing REV L	Quantity
MS27183-14	ID 0.406	OD 0.812	Thickness 0.051	Drawing REV L	Quantity
MS27183-15	ID 0.438	OD 1.0	Thickness 0.064	Drawing REV L	Quantity
MS27183-16	ID 0.469	OD 0.922	Thickness 0.051	Drawing REV L	Quantity
MS27183-17	ID 0.5	OD 1.25	Thickness 0.064	Drawing REV L	Quantity
MS27183-18	ID 0.531	OD 1.062	Thickness 0.074	Drawing REV L	Quantity
MS27183-19	ID 0.562	OD 1.375	Thickness 0.086	Drawing REV L	Quantity
MS27183-2	ID 0.094	OD 0.25	Thickness 0.016	Drawing REV L	Quantity
MS27183-20	ID 0.594	OD 1.156	Thickness 0.074	Drawing REV L	Quantity
MS27183-21	ID 0.656	OD 1.312	Thickness 0.074	Drawing REV L	Quantity
MS27183-22	ID 0.688	OD 1.75	Thickness 0.108	Drawing REV L	Quantity
MS27183-23	ID 0.812	OD 1.469	Thickness 0.108	Drawing REV L	Quantity
MS27183-24	ID 0.812	OD 2.0	Thickness 0.122	Drawing REV L	Quantity
MS27183-25	ID 0.938	OD 1.75	Thickness 0.108	Drawing REV L	Quantity
MS27183-26	ID 0.938	OD 2.25	Thickness 0.136	Drawing REV L	Quantity
MS27183-27	ID 1.062	OD 2.0	Thickness 0.108	Drawing REV L	Quantity
MS27183-28	ID 1.062	OD 2.5	Thickness 0.136	Drawing REV L	Quantity
MS27183-29	ID 1.25	OD 2.75	Thickness 0.136	Drawing REV L	Quantity
MS27183-3	ID 0.125	OD 0.25	Thickness 0.017	Drawing REV L	Quantity
MS27183-30	ID 1.375	OD 3.0	Thickness 0.136	Drawing REV L	Quantity
MS27183-31	ID 1.5	OD 3.25	Thickness 0.153	Drawing REV L	Quantity
MS27183-32	ID 1.625	OD 3.5	Thickness 0.153	Drawing REV L	Quantity
MS27183-33	ID 1.75	OD 3.75	Thickness 0.153	Drawing REV L	Quantity
MS27183-34	ID 1.875	OD 4.0	Thickness 0.153	Drawing REV L	Quantity
MS27183-35	ID 2.0	OD 4.25	Thickness 0.153	Drawing REV L	Quantity
MS27183-36	ID 2.125	OD 4.5	Thickness 0.153	Drawing REV L	Quantity
MS27183-37	ID 2.375	OD 4.75	Thickness 0.193	Drawing REV L	Quantity
MS27183-38	ID 2.625	OD 5.0	Thickness 0.21	Drawing REV L	Quantity
MS27183-39	ID 2.875	OD 5.25	Thickness 0.228	Drawing REV L	Quantity
MS27183-3B	ID 0.125	OD 0.25	Thickness 0.017	Drawing REV L	Quantity
MS27183-4	ID 0.125	OD 0.312	Thickness 0.025	Drawing REV L	Quantity
MS27183-40	ID 3.125	OD 5.5	Thickness 0.249	Drawing REV L	Quantity
MS27183-41	ID 0.188	OD 0.438	Thickness 0.036	Drawing REV L	Quantity
MS27183-41C	ID 0.188	OD 0.438	Thickness 0.036	Drawing REV L	Quantity
MS27183-42	ID 0.219	OD 0.5	Thickness 0.036	Drawing REV L	Quantity
MS27183-43	ID 0.156	OD 0.25	Thickness 0.013	Drawing REV L	Quantity
MS27183-44	ID 0.125	OD 0.375	Thickness 0.025	Drawing REV L	Quantity
MS27183-45	ID 0.141	OD 0.281	Thickness 0.025	Drawing REV L	Quantity
MS27183-46	ID 0.188	OD 0.5	Thickness 0.051	Drawing REV L	Quantity
MS27183-47	ID 0.219	OD 0.365	Thickness 0.025	Drawing REV L	Quantity
MS27183-48	ID 0.25	OD 0.938	Thickness 0.051	Drawing REV L	Quantity
MS27183-49	ID 0.25	OD 0.562	Thickness 0.025	Drawing REV L	Quantity
MS27183-4BO	ID 0.125	OD 0.312	Thickness 0.025	Drawing REV L	Quantity
MS27183-5	ID 0.156	OD 0.312	Thickness 0.027	Drawing REV L	Quantity
MS27183-50	ID 0.25	OD 0.625	Thickness 0.025	Drawing REV L	Quantity
MS27183-51	ID 0.25	OD 1.0	Thickness 0.051	Drawing REV L	Quantity
MS27183-52	ID 0.281	OD 0.734	Thickness 0.051	Drawing REV L	Quantity
MS27183-53	ID 0.312	OD 0.875	Thickness 0.051	Drawing REV L	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