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.
Dept. of the Army 
Dept. of the Navy 
Greece Classification: Copper washers including spring washers not threaded
NSN 5945-01-370-4362
NSN 5920-00-529-0618
NSN 6105-01-051-5901
NSN 5895-00-866-4313
NSN 5835-00-975-6538
NSN 6610-01-549-1802
NSN 6150-01-521-3211
NSN 5945-01-038-5621
NSN 5835-01-352-7211
NSN 5996-01-100-1499
NSN 6110-01-175-2082
NSN 5985-01-486-0297