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 
Greece Classification: Copper washers including spring washers not threaded
NSN 5999-00-083-5591
NSN 5835-01-200-7153
NSN 6620-01-098-9866
NSN 5998-00-613-2296
NSN 4140-01-012-3996
NSN 6220-00-925-0522
NSN 6645-01-064-3711
NSN 6650-01-077-3352
NSN 6645-01-577-5891
NSN 6610-01-451-8096
NSN 5990-01-215-0590
NSN 5999-00-035-9288