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 751–800 of 1,345 products

SKU ID OD Thickness Drawing Quantity

MS27183-54

ID 0.312
OD 0.5
Thickness 0.027
Drawing REV L
Quantity

MS27183-55

ID 0.375
OD 0.734
Thickness 0.064
Drawing REV L
Quantity

MS27183-56

ID 0.375
OD 0.625
Thickness 0.027
Drawing REV L
Quantity

MS27183-57

ID 0.406
OD 0.875
Thickness 0.051
Drawing REV L
Quantity

MS27183-58

ID 0.412
OD 0.625
Thickness 0.025
Drawing REV L
Quantity

MS27183-59

ID 0.438
OD 1.365
Thickness 0.064
Drawing REV L
Quantity

MS27183-6

ID 0.156
OD 0.375
Thickness 0.036
Drawing REV L
Quantity

MS27183-60

ID 0.438
OD 0.875
Thickness 0.051
Drawing REV L
Quantity

MS27183-61

ID 0.438
OD 1.625
Thickness 0.051
Drawing REV L
Quantity

MS27183-62

ID 0.469
OD 0.734
Thickness 0.051
Drawing REV L
Quantity

MS27183-63

ID 0.656
OD 2.125
Thickness 0.08
Drawing REV L
Quantity

MS27183-7

ID 0.188
OD 0.375
Thickness 0.036
Drawing REV L
Quantity

MS27183-8

ID 0.219
OD 0.438
Thickness 0.036
Drawing REV L
Quantity

MS27183-9

ID 0.25
OD 0.562
Thickness 0.051
Drawing REV L
Quantity

MS51412-1

ID 0.156
OD 0.375
Thickness 0.036
Drawing REV C
Quantity

MS51412-10

ID 0.562
OD 1.375
Thickness 0.086
Drawing REV C
Quantity

MS51412-11

ID 0.656
OD 1.312
Thickness 0.074
Drawing REV C
Quantity

MS51412-12

ID 0.688
OD 1.75
Thickness 0.108
Drawing REV C
Quantity

MS51412-13

ID 0.812
OD 1.469
Thickness 0.108
Drawing REV C
Quantity

MS51412-18

ID 0.188
OD 0.438
Thickness 0.036
Drawing REV C
Quantity

MS51412-2

ID 0.219
OD 0.5
Thickness 0.036
Drawing REV C
Quantity

MS51412-21

ID 0.219
OD 0.656
Thickness 0.055
Drawing REV C
Quantity

MS51412-21A

ID 0.219
OD 0.656
Thickness 0.055
Drawing REV C
Quantity

MS51412-22

ID 0.234
OD 0.375
Thickness 0.043
Drawing REV C
Quantity

MS51412-23

ID 0.266
OD 0.812
Thickness 0.075
Drawing REV C
Quantity

MS51412-24

ID 0.266
OD 1.0
Thickness 0.059
Drawing REV C
Quantity

MS51412-25

ID 0.344
OD 1.0
Thickness 0.059
Drawing REV C
Quantity

MS51412-26

ID 0.375
OD 0.625
Thickness 0.09
Drawing REV C
Quantity

MS51412-27

ID 0.406
OD 1.25
Thickness 0.075
Drawing REV C
Quantity

MS51412-28

ID 0.5
OD 0.688
Thickness 0.029
Drawing REV C
Quantity

MS51412-29

ID 0.562
OD 0.734
Thickness 0.057
Drawing REV C
Quantity

MS51412-3

ID 0.25
OD 0.562
Thickness 0.036
Drawing REV C
Quantity

MS51412-30

ID 0.656
OD 1.25
Thickness 0.099
Drawing REV C
Quantity

MS51412-32

ID 0.812
OD 1.25
Thickness 0.028
Drawing REV C
Quantity

MS51412-33

ID 0.938
OD 1.375
Thickness 0.028
Drawing REV C
Quantity

MS51412-36

ID 0.281
OD 0.968
Thickness 0.036
Drawing REV C
Quantity

MS51412-39

ID 0.438
OD 1.0
Thickness 0.064
Drawing REV C
Quantity

MS51412-4

ID 0.281
OD 0.625
Thickness 0.051
Drawing REV C
Quantity

MS51412-43

ID 1.125
OD 2.5
Thickness 0.136
Drawing REV C
Quantity

MS51412-4A

ID 0.281
OD 0.625
Thickness 0.051
Drawing REV C
Quantity

MS51412-5

ID 0.312
OD 0.734
Thickness 0.051
Drawing REV C
Quantity

MS51412-6

ID 0.375
OD 0.875
Thickness 0.064
Drawing REV C
Quantity

MS51412-7

ID 0.438
OD 1.0
Thickness 0.051
Drawing REV C
Quantity

MS51412-8

ID 0.5
OD 1.25
Thickness 0.064
Drawing REV C
Quantity

MS51412-9

ID 0.531
OD 1.062
Thickness 0.074
Drawing REV C
Quantity

MS51496-P61

ID 0.063
OD 0.12
Thickness 0.022
Drawing REV B
Quantity

MS51496-P62

ID 0.063
OD 0.151
Thickness 0.013
Drawing REV B
Quantity

MS51496-P63

ID 0.089
OD 0.156
Thickness 0.022
Drawing REV B
Quantity

MS51496-P64

ID 0.104
OD 0.214
Thickness 0.022
Drawing REV B
Quantity

MS51496-P65

ID 0.12
OD 0.17
Thickness 0.029
Drawing REV B
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.