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 801–850 of 1,345 products

SKU ID OD Thickness Drawing Quantity

MS51496-P66

ID 0.12
OD 0.25
Thickness 0.013
Drawing REV B
Quantity

MS51496-P67

ID 0.12
OD 0.25
Thickness 0.028
Drawing REV B
Quantity

MS51496-P68

ID 0.146
OD 0.274
Thickness 0.013
Drawing REV B
Quantity

MS51496-P69

ID 0.146
OD 0.274
Thickness 0.029
Drawing REV B
Quantity

MS51496-P70

ID 0.169
OD 0.278
Thickness 0.029
Drawing REV B
Quantity

MS51496-P71

ID 0.189
OD 0.305
Thickness 0.029
Drawing REV B
Quantity

MS51496-P73

ID 0.2
OD 0.355
Thickness 0.029
Drawing REV B
Quantity

MS51496-P75

ID 0.26
OD 0.45
Thickness 0.029
Drawing REV B
Quantity

MS51496-P77

ID 0.278
OD 0.43
Thickness 0.029
Drawing REV B
Quantity

MS51496-P78

ID 0.307
OD 0.515
Thickness 0.029
Drawing REV B
Quantity

MS51496-P79

ID 0.089
OD 0.13
Thickness 0.01
Drawing REV B
Quantity

MS51496-P80

ID 0.12
OD 0.17
Thickness 0.013
Drawing REV B
Quantity

MS51496-P82

ID 0.21
OD 0.385
Thickness 0.04
Drawing REV B
Quantity

MS51496-P84

ID 0.26
OD 0.35
Thickness 0.022
Drawing REV B
Quantity

MS51496-P85

ID 0.401
OD 0.62
Thickness 0.045
Drawing REV B
Quantity

MS51496-P86

ID 0.64
OD 1.032
Thickness 0.04
Drawing REV B
Quantity

MS51496-P87

ID 0.79
OD 1.1
Thickness 0.013
Drawing REV B
Quantity

MS51859-1

ID 0.09
OD 0.183
Thickness 0.025
Drawing REV C
Quantity

MS51859-10

ID 0.521
OD 1.052
Thickness 0.04
Drawing REV C
Quantity

MS51859-11

ID 0.06
OD 0.183
Thickness 0.016
Drawing REV C
Quantity

MS51859-12

ID 0.073
OD 0.15
Thickness 0.016
Drawing REV C
Quantity

MS51859-13

ID 0.09
OD 0.245
Thickness 0.011
Drawing REV C
Quantity

MS51859-14

ID 0.115
OD 0.338
Thickness 0.025
Drawing REV C
Quantity

MS51859-17

ID 0.26
OD 0.55
Thickness 0.056
Drawing REV C
Quantity

MS51859-18

ID 0.26
OD 0.86
Thickness 0.025
Drawing REV C
Quantity

MS51859-2

ID 0.115
OD 0.275
Thickness 0.031
Drawing REV C
Quantity

MS51859-22

ID 0.521
OD 1.61
Thickness 0.015
Drawing REV C
Quantity

MS51859-3

ID 0.14
OD 0.305
Thickness 0.031
Drawing REV C
Quantity

MS51859-4

ID 0.17
OD 0.365
Thickness 0.031
Drawing REV C
Quantity

MS51859-5

ID 0.2
OD 0.425
Thickness 0.031
Drawing REV C
Quantity

MS51859-6

ID 0.26
OD 0.6
Thickness 0.04
Drawing REV C
Quantity

MS51859-7

ID 0.334
OD 0.678
Thickness 0.04
Drawing REV C
Quantity

MS51859-8

ID 0.396
OD 0.802
Thickness 0.04
Drawing REV C
Quantity

MS51859-9

ID 0.459
OD 0.912
Thickness 0.04
Drawing REV C
Quantity

MS91124-1

ID 0.257
OD 0.39
Thickness 0.02
Drawing REV A
Quantity

MS91124-2

ID 0.343
OD 0.635
Thickness 0.02
Drawing REV A
Quantity

MS91124-3

ID 0.44
OD 0.635
Thickness 0.02
Drawing REV A
Quantity

MS91124-4

ID 0.219
OD 0.39
Thickness 0.02
Drawing REV A
Quantity

MS91124-5

ID 0.75
OD 1.18
Thickness 0.02
Drawing REV A
Quantity

MS91124-6

ID 0.9
OD 1.18
Thickness 0.02
Drawing REV A
Quantity

MS91124-7

ID 0.17
OD 0.39
Thickness 0.02
Drawing REV A
Quantity

MS9321-04

ID 0.119
OD 0.25
Thickness 0.031
Drawing AS9321 REV A
Quantity

MS9321-05

ID 0.135
OD 0.312
Thickness 0.031
Drawing AS9321 REV A
Quantity

MS9321-06

ID 0.15
OD 0.312
Thickness 0.043
Drawing AS9321 REV A
Quantity

MS9321-07

ID 0.159
OD 0.375
Thickness 0.043
Drawing AS9321 REV A
Quantity

MS9321-08

ID 0.184
OD 0.375
Thickness 0.05
Drawing AS9321 REV A
Quantity

MS9321-09

ID 0.213
OD 0.438
Thickness 0.062
Drawing AS9321 REV A
Quantity

MS9321-10

ID 0.276
OD 0.5
Thickness 0.062
Drawing AS9321 REV A
Quantity

MS9321-11

ID 0.338
OD 0.625
Thickness 0.062
Drawing AS9321 REV A
Quantity

MS9321-12

ID 0.401
OD 0.75
Thickness 0.078
Drawing AS9321 REV A
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.