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 5945-01-619-4004
NSN 5945-00-723-9801
NSN 5905-01-158-0170
NSN 6110-01-083-7524
NSN 5855-01-122-9418
NSN 2925-00-221-4977
NSN 5910-00-548-9888
NSN 6135-00-962-4111
NSN 6135-01-222-0703
NSN 5920-01-573-7227
NSN 6135-01-222-5464
NSN 7035-01-559-8801