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 5935-00-134-8577
NSN 5945-01-426-1064
NSN 6620-00-170-5296
NSN 5945-00-151-4623
NSN 6645-00-975-6941
NSN 5965-01-090-6245
NSN 6145-01-634-0388
NSN 6130-01-324-3111
NSN 5985-01-580-0952
NSN 5905-00-932-3323
NSN 6110-00-160-1374
NSN 6110-01-124-5637