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 
National Security Agency 
U.s. Marine Corps 
Dept. of the Navy 
Defense Logistics Agency 
Federal Aviation Administration
Federal Aviation Administration 
U.s. Coast Guard 
National Weather Service 
National Aeronautics and Space Administration
National Aeronautics and Space Administration
National Aeronautics and Space Administration 
Austria 
Finland 
Poland 
Czech Republic 
Brazil 
Spain 
Columbia 
Israel 
Singapore 
Kuwait 
Morocco 
Saudi Arabia 
Malaysia 
Thailand 
Australia 
Belgium 
Canada 
South Africa 
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 6685-01-446-5825
NSN 5975-01-391-7529
NSN 5965-00-170-5254
NSN 6130-01-230-7611
NSN 5910-01-238-1500
NSN 5835-00-170-5238
NSN 5965-01-163-8958
NSN 5925-00-583-8922
NSN 6685-01-528-4710
NSN 6145-01-654-6699
NSN 5999-01-426-3213
NSN 6240-00-876-0005