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 
Spain 
Republic of Korea 
Portugal 
Italy 
Greece 
Turkey Classification: Washers other than lock washers, iron or steel
NSN 4140-01-461-9775
NSN 5895-01-263-3702
NSN 4140-01-295-4800
NSN 6150-00-303-1565
NSN 6645-01-425-1673
NSN 5990-01-440-7135
NSN 6110-00-600-8508
NSN 6240-00-235-5159
NSN 6620-01-067-9285
NSN 5915-01-580-0308
NSN 6650-01-519-3818
NSN 4140-01-525-0786