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 5965-00-100-1291
NSN 5990-01-037-9801
NSN 5925-01-361-7683
NSN 6130-01-487-4818
NSN 6685-01-363-4028
NSN 6130-00-935-0378
NSN 5996-01-564-6864
NSN 5905-01-045-8020
NSN 5965-01-136-7970
NSN 5925-01-431-3138
NSN 5915-01-539-7634
NSN 7035-01-512-2453