Home | MS21299 Washers - Mil-Spec Washers for Aerospace & Defense

MS21299 Washers - Mil-Spec Washers for Aerospace & Defense

MS21299 washers are military standard washers used in precision aerospace and defense assemblies. Superior Washer & Gasket Corp manufactures MS21299 mil-spec washers from DFARS-compliant materials with complete material certifications to support military and government contractor procurement requirements.

As an ISO 9001:2015 certified mil-spec washer manufacturer, we maintain rigorous quality controls and provide full traceability for all military washers. MS21299 military flat washers are made in the U.S.A. and available in standard and custom quantities with fast lead times.

  • MS21299 mil-spec washers to military standards
  • DFARS-compliant materials with full certifications
  • ISO 9001:2015 certified manufacturing
  • Complete quality documentation provided
  • Made in the U.S.A.

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Showing 1–10 of 10 products

SKU ID OD Thickness Drawing Quantity

MS21299-10

ID 0.627
OD 1.182
Thickness 0.062
Drawing REV 3
Quantity

MS21299-12

ID 0.752
OD 1.423
Thickness 0.062
Drawing REV 3
Quantity

MS21299-3

ID 0.191
OD 0.377
Thickness 0.062
Drawing REV 3
Quantity

MS21299-4

ID 0.251
OD 0.481
Thickness 0.062
Drawing REV 3
Quantity

MS21299-5

ID 0.314
OD 0.588
Thickness 0.062
Drawing REV 3
Quantity

MS21299-6

ID 0.376
OD 0.702
Thickness 0.062
Drawing REV 3
Quantity

MS21299-7

ID 0.439
OD 0.821
Thickness 0.062
Drawing REV 3
Quantity

MS21299-8

ID 0.501
OD 0.94
Thickness 0.062
Drawing REV 3
Quantity

MS21299-C3

ID 0.191
OD 0.377
Thickness 0.057
Drawing NASM21299 COUNTERSUNK
Quantity

MS21299-C5

ID 0.314
OD 0.588
Thickness 0.057
Drawing NASM21299
Quantity

MS21299 Military Washers Frequently Asked Questions

What are MS21299 washers?

MS21299 washers are mil-spec flat washers manufactured to Military Standard specification MS21299 / NASM21299. This specification covers both standard flat and countersunk configurations, and Superior Washer stocks both variants.

Are your MS21299 washers made in the USA with DFARS-compliant materials?

Yes. All MS21299 washers are manufactured in the United States under our ISO 9001:2015 certified Quality Management System, audited by DNV. MS21299 washers are made from high-strength alloy steel (4130) and select variants use 17-4 PH stainless steel (630), both of which are DFARS specialty metals. All materials used in our MS21299 washers are sourced from the United States or qualifying countries in compliance with DFARS requirements. Material certifications and DFARS compliance documentation are available upon request.

MS21299 washers are part of Superior Washer's complete range of military flat washers manufactured to MS, AN, and NAS standards for defense and aerospace applications.