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.
Spain 
Canada 
Germany 
Republic of Korea Classification: Washers other than lock washers, iron or steel
NSN 2925-01-537-5310
NSN 5855-00-323-0967
NSN 5990-01-185-9835
NSN 5965-01-382-9081
NSN 6650-01-364-1313
NSN 7035-01-443-3052
NSN 6650-00-256-9059
NSN 6110-01-391-7542
NSN 6110-01-514-5519
NSN 5855-01-508-4654
NSN 6130-01-090-1214
NSN 6650-01-610-5017