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 6610-01-144-0719
NSN 6110-01-484-7181
NSN 6110-00-402-7637
NSN 6240-01-485-7308
NSN 5910-00-518-1477
NSN 5999-01-565-5288
NSN 6650-01-087-8993
NSN 5945-01-542-8744
NSN 4140-00-285-6042
NSN 5910-01-619-7462
NSN 5999-01-344-7523
NSN 4140-01-222-7552