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 851–900 of 1,345 products

SKU ID OD Thickness Material Drawing Quantity

MS9321-13

ID 0.463
OD 0.875
Thickness 0.094
Material
Drawing AS9321 REV A
Quantity

MS9321-14

ID 0.526
OD 1.0
Thickness 0.109
Material
Drawing AS9321 REV A
Quantity

MS9321-15

ID 0.588
OD 1.125
Thickness 0.125
Material
Drawing AS9321 REV A
Quantity

MS9321-16

ID 0.651
OD 1.25
Thickness 0.141
Material
Drawing AS9321 REV A
Quantity

MS9321-17

ID 0.776
OD 1.5
Thickness 0.172
Material
Drawing AS9321 REV A
Quantity

MS9321-18

ID 0.901
OD 1.75
Thickness 0.203
Material
Drawing AS9321 REV A
Quantity

MS9321-19

ID 1.026
OD 2.0
Thickness 0.234
Material
Drawing AS9321 REV A
Quantity

MS9549-04

ID 0.119
OD 0.25
Thickness 0.014
Material
Drawing AS9549 REV A
Quantity

MS9549-05

ID 0.135
OD 0.312
Thickness 0.014
Material
Drawing AS9549 REV A
Quantity

MS9549-06

ID 0.15
OD 0.312
Thickness 0.014
Material
Drawing AS9549 REV A
Quantity

MS9549-07

ID 0.159
OD 0.375
Thickness 0.014
Material
Drawing AS9549 REV A
Quantity

MS9549-08

ID 0.184
OD 0.375
Thickness 0.014
Material
Drawing AS9549 REV A
Quantity

MS9549-09

ID 0.213
OD 0.438
Thickness 0.028
Material
Drawing AS9549 REV A
Quantity

MS9549-10

ID 0.276
OD 0.5
Thickness 0.028
Material
Drawing AS9549 REV A
Quantity

MS9549-11

ID 0.338
OD 0.562
Thickness 0.028
Material
Drawing AS9549 REV A
Quantity

MS9549-12

ID 0.401
OD 0.625
Thickness 0.028
Material
Drawing AS9549 REV A
Quantity

MS9549-13

ID 0.463
OD 0.75
Thickness 0.028
Material
Drawing AS9549 REV A
Quantity

MS9549-14

ID 0.526
OD 0.812
Thickness 0.028
Material
Drawing AS9549 REV A
Quantity

MS9549-15

ID 0.588
OD 0.938
Thickness 0.028
Material
Drawing AS9549 REV A
Quantity

MS9549-16

ID 0.651
OD 1.0
Thickness 0.028
Material
Drawing AS9549 REV A
Quantity

MS9549-17

ID 0.776
OD 1.188
Thickness 0.028
Material
Drawing AS9549 REV A
Quantity

MS9549-18

ID 0.901
OD 1.375
Thickness 0.028
Material
Drawing AS9549 REV A
Quantity

MS9549-19

ID 1.026
OD 1.562
Thickness 0.028
Material
Drawing AS9549 REV A
Quantity

NAS1149B0332H

ID 0.203
OD 0.438
Thickness 0.032
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149B0432H

ID 0.265
OD 0.5
Thickness 0.032
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149B0463H

ID 0.265
OD 0.5
Thickness 0.063
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149B0516H

ID 0.328
OD 0.562
Thickness 0.016
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149B0532H

ID 0.328
OD 0.562
Thickness 0.032
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149B0563H

ID 0.328
OD 0.562
Thickness 0.063
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149B0632H

ID 0.39
OD 0.625
Thickness 0.032
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149B0663H

ID 0.39
OD 0.625
Thickness 0.063
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149B0763H

ID 0.453
OD 0.75
Thickness 0.063
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149B1016H

ID 0.64
OD 1.188
Thickness 0.016
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149B1032H

ID 0.64
OD 1.188
Thickness 0.032
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149B1063H

ID 0.64
OD 1.188
Thickness 0.063
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149BN316H

ID 0.105
OD 0.25
Thickness 0.016
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149BN632H

ID 0.149
OD 0.375
Thickness 0.032
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149BN832H

ID 0.174
OD 0.375
Thickness 0.032
Material BRASS 1/4 HD MIN ALLOY 260 ASTMB36
Drawing REV 7
Quantity

NAS1149C0316B

ID 0.203
OD 0.438
Thickness 0.016
Material 301 SS 1/4 HD AMS5517
Drawing REV 7
Quantity

NAS1149C0316R

ID 0.203
OD 0.438
Thickness 0.016
Material 301 SS 1/4 HD AMS5517
Drawing REV 7
Quantity

NAS1149C0332B

ID 0.203
OD 0.438
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0432B

ID 0.265
OD 0.5
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0432R

ID 0.265
OD 0.5
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0463B

ID 0.265
OD 0.5
Thickness 0.063
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0463R

ID 0.265
OD 0.5
Thickness 0.063
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0516B

ID 0.328
OD 0.562
Thickness 0.016
Material 301 SS 1/4 HD AMS5517
Drawing REV 7
Quantity

NAS1149C0516R

ID 0.328
OD 0.562
Thickness 0.016
Material 301 SS 1/4 HD AMS5517
Drawing REV 7
Quantity

NAS1149C0532B

ID 0.328
OD 0.562
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0532R

ID 0.328
OD 0.562
Thickness 0.032
Material 301/302/304 A AMS5901,5516,5513
Drawing REV 7
Quantity

NAS1149C0563B

ID 0.328
OD 0.562
Thickness 0.063
Material 301/302/304 A AMS5901,5516,5513
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.