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 
Canada 
United Kingdom Classification: Parts of armored fighting vehicles,motorized, whether or not fitted with weapons
NSN 6145-01-629-4079
NSN 5965-01-141-3938
NSN 5910-00-801-5854
NSN 5915-00-056-5007
NSN 6240-01-052-7690
NSN 5950-01-479-7640
NSN 5895-00-988-4416
NSN 5855-01-318-7663
NSN 5915-01-603-6323
NSN 5996-00-615-9665
NSN 6110-01-545-1839
NSN 5935-01-400-1336