Home | AN901 Military Washers - Aeronautical Standard Specification

AN901 Military Washers - Aeronautical Standard Specification

AN901 washers are manufactured to Aeronautical Standard (AN) specifications for use in military and aerospace fastener assemblies. Superior Washer & Gasket Corp produces AN901 mil-spec washers from DFARS-compliant materials with full material certifications to meet the stringent requirements of defense and aviation procurement.

As an ISO 9001:2015 certified manufacturer, we maintain a Quality Management System (QMS) that is regularly audited to ensure compliance with military and aerospace standards. Our AN901 military washers are manufactured in the U.S.A. and available with supporting documentation for government and prime contractor procurement.

  • AN901 military washers to aeronautical standards
  • DFARS-compliant materials with certifications
  • ISO 9001:2015 certified manufacturing
  • Full traceability and quality documentation
  • Made in the U.S.A.

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Showing 1–22 of 22 products

SKU ID OD Thickness Drawing Quantity

AN901-10A

ID 0.88
OD 1.12
Thickness 0.048
Drawing REV 11
Quantity

AN901-10C

ID 0.88
OD 1.12
Thickness 0.048
Drawing REV 11
Quantity

AN901-12A

ID 1.068
OD 1.37
Thickness 0.048
Drawing REV 11
Quantity

AN901-12C

ID 1.068
OD 1.37
Thickness 0.048
Drawing REV 11
Quantity

AN901-16A

ID 1.318
OD 1.62
Thickness 0.048
Drawing REV 11
Quantity

AN901-16C

ID 1.318
OD 1.62
Thickness 0.048
Drawing REV 11
Quantity

AN901-20A

ID 1.63
OD 1.87
Thickness 0.048
Drawing REV 11
Quantity

AN901-20C

ID 1.63
OD 1.87
Thickness 0.048
Drawing REV 11
Quantity

AN901-24A

ID 1.88
OD 2.12
Thickness 0.048
Drawing REV 11
Quantity

AN901-24C

ID 1.88
OD 2.12
Thickness 0.048
Drawing REV 11
Quantity

AN901-28A

ID 2.255
OD 2.495
Thickness 0.048
Drawing REV 11
Quantity

AN901-28C

ID 2.255
OD 2.495
Thickness 0.048
Drawing REV 11
Quantity

AN901-32A

ID 2.505
OD 2.745
Thickness 0.048
Drawing REV 11
Quantity

AN901-32C

ID 2.505
OD 2.745
Thickness 0.048
Drawing REV 11
Quantity

AN901-4A

ID 0.443
OD 0.683
Thickness 0.048
Drawing REV 11
Quantity

AN901-4C

ID 0.443
OD 0.683
Thickness 0.048
Drawing REV 11
Quantity

AN901-5A

ID 0.505
OD 0.745
Thickness 0.048
Drawing REV 11
Quantity

AN901-5C

ID 0.505
OD 0.745
Thickness 0.048
Drawing REV 11
Quantity

AN901-6A

ID 0.568
OD 0.808
Thickness 0.048
Drawing REV 11
Quantity

AN901-6C

ID 0.568
OD 0.808
Thickness 0.048
Drawing REV 11
Quantity

AN901-8A

ID 0.755
OD 0.995
Thickness 0.048
Drawing REV 11
Quantity

AN901-8C

ID 0.755
OD 0.995
Thickness 0.048
Drawing REV 11
Quantity

AN901 Military Washers Frequently Asked Questions

What are AN901 washers?

AN901 washers are mil-spec sealing washers manufactured to Aeronautical Standard (AN) specifications. Designed for use in hydraulic and fluid line fittings in military and aerospace fastener assemblies, they function as gasket-style washers to prevent fluid leakage. AN901 washers are available in aluminum (suffix “A”) and copper (suffix “C”) to suit different sealing and fluid compatibility requirements.

What materials are AN901 washers available in?

AN901 washers are available in aluminum (part numbers ending in “A”) and copper (part numbers ending in “C”). Both materials meet Aeronautical Standard specifications for the AN901 series.

What sizes are available for AN901 washers?

AN901 washers are available in nominal sizes 4 through 32, covering inside diameters from approximately 0.443" to 2.505" with a uniform 0.048" thickness, stocked in both aluminum and copper.

What drawing revision are your AN901 washers manufactured to?

All Superior Washer AN901 washers are manufactured to Drawing REV 11 of the AN901 Aeronautical Standard specification.

Are your AN901 washers made in the USA with DFARS-compliant materials?

Yes. All AN901 washers are manufactured in the United States under our ISO 9001:2015 certified QMS audited by DNV. Both materials used in the AN901 series, aluminum and copper, are exempt from DFARS specialty metal restrictions and are commercially available without restriction. Material certifications are available upon request.

Superior Washer's AN901 sealing washers are part of a comprehensive lineup of military washers and mil-spec washers manufactured in the USA to AN, MS, and NAS standards.