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 4140-01-514-9581
NSN 6240-00-222-0276
NSN 6645-00-965-5273
NSN 6150-00-887-7094
NSN 7035-01-215-7764
NSN 6105-01-250-2977
NSN 5999-00-141-0291
NSN 5985-01-617-3280
NSN 5930-01-549-5708
NSN 5910-00-957-9938
NSN 5915-01-024-7293
NSN 6105-01-552-5660