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 6645-00-372-2618
NSN 6145-00-836-0510
NSN 6130-01-396-6197
NSN 2925-01-400-2286
NSN 6685-00-675-0060
NSN 5985-00-866-2852
NSN 7035-01-505-5979
NSN 6135-01-448-4680
NSN 5925-00-426-9063
NSN 6105-01-054-3649
NSN 5950-01-366-5931
NSN 5999-01-225-4508