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 Air Force 
Dept. of the Navy 
U.s. Coast Guard 
Canada 
United Kingdom 
Greece 
Turkey Classification: Washers other than lock washers, iron or steel
NSN 5910-01-640-6820
NSN 6105-01-111-0141
NSN 6145-00-284-1514
NSN 5855-01-093-3080
NSN 6220-01-323-5408
NSN 6110-01-387-4748
NSN 5905-01-040-1832
NSN 5960-01-370-4285
NSN 6645-01-250-5154
NSN 6110-01-567-7214
NSN 6685-00-725-1346
NSN 4140-01-622-7314