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 
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U.s. Marine Corps 
Dept. of the Navy 
U.s. Coast Guard 
Finland 
Lithuania 
Slovenia 
Poland 
Romania 
Bulgaria 
Czech Republic 
Brazil 
Spain 
Columbia 
Singapore 
Malaysia 
Australia 
Belgium 
Canada 
New Zealand 
France 
Germany 
Republic of Korea 
United Kingdom 
Netherlands 
Portugal 
Italy 
Denmark 
Norway 
Greece 
Turkey 
NATO Maintenance and Supply Agency Classification: Washers other than lock washers, iron or steel
NSN 5999-01-634-0576
NSN 5945-00-242-4514
NSN 6110-01-427-3671
NSN 5960-01-503-0362
NSN 6110-01-169-2301
NSN 5925-01-331-6994
NSN 5945-01-213-9189
NSN 5945-01-463-7332
NSN 6220-01-364-8666
NSN 5990-01-292-6000
NSN 7035-01-386-5722
NSN 5920-01-647-5869