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 5905-00-648-2323
NSN 5935-01-513-5815
NSN 6145-01-381-2529
NSN 6620-00-361-3590
NSN 6240-00-280-8502
NSN 5895-00-385-9003
NSN 6685-01-070-3496
NSN 4140-01-105-6828
NSN 5999-01-202-8707
NSN 5915-00-034-4824
NSN 7035-01-352-6235
NSN 5835-00-170-5238