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 
U.s. Marine Corps 
Dept. of the Navy 
Spain 
Portugal 
Greece Classification: Washers other than lock washers, iron or steel
NSN 5975-01-560-2188
NSN 6620-01-423-5875
NSN 5985-01-462-1845
NSN 5925-01-497-0343
NSN 5920-01-494-2424
NSN 5990-01-061-5618
NSN 6130-01-539-0419
NSN 5965-01-296-8991
NSN 6240-01-220-6066
NSN 5990-01-594-7470
NSN 6610-01-123-2276
NSN 5960-01-500-6615