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 Navy 
Spain 
Republic of Korea NSN 5920-01-362-8814
NSN 5895-01-420-6926
NSN 5855-01-096-9294
NSN 5990-00-042-3413
NSN 5996-01-647-9757
NSN 5905-01-488-7773
NSN 5915-01-331-8695
NSN 5915-01-533-2185
NSN 5965-01-459-8203
NSN 5895-01-148-8027
NSN 5925-01-031-1472
NSN 5895-01-149-7267