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
Defense Threat Reduction Agency
U.s. Marine Corps
Dept. of the Navy
U.s. Coast Guard
National Aeronautics and Space Administration
Austria
Finland
Hungary
Poland
Czech Republic
Brazil
Spain
Columbia
Israel
Singapore
Morocco
Saudi Arabia
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 5905-01-407-7472
NSN 6610-01-633-8931
NSN 6110-01-430-2408
NSN 6620-01-189-8153
NSN 6220-01-474-5682
NSN 6610-01-371-3006
NSN 6220-01-433-8605
NSN 6240-01-468-6408
NSN 5910-01-106-9016
NSN 5905-01-037-2295
NSN 6610-01-299-1713
NSN 6150-01-417-5693