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 
U.s. Marine Corps 
Canada 
Greece Classification: Washers other than lock washers, iron or steel
NSN 5910-01-214-1348
NSN 6240-01-478-3854
NSN 5998-01-437-6506
NSN 6110-01-025-6139
NSN 7035-00-096-9986
NSN 5905-01-007-5606
NSN 4140-00-008-7638
NSN 4140-01-345-6625
NSN 5996-00-973-3604
NSN 5920-00-717-6839
NSN 5985-01-421-3381
NSN 5925-00-782-6946