A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes disk, valve, graphite impregnated and lubricated items.
Republic of Korea 
Greece 
Turkey Classification: Gaskets, washers and other seals, of vulcanized rubber other than hard rubber
NSN 5985-01-068-2744
NSN 5905-01-464-4945
NSN 6220-01-204-8916
NSN 5930-01-461-8362
NSN 6685-00-548-4419
NSN 5925-00-578-4774
NSN 6135-01-142-6456
NSN 2925-01-228-6554
NSN 5965-00-368-8204
NSN 6240-00-717-0844
NSN 6620-01-569-4621
NSN 5920-00-069-5915