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 6105-00-126-2620
NSN 5895-01-181-7048
NSN 6645-01-014-2849
NSN 5985-01-632-5303
NSN 5985-01-500-9253
NSN 5920-01-442-6756
NSN 6650-00-382-6080
NSN 6610-01-583-4539
NSN 6145-01-059-0398
NSN 5998-01-258-9086
NSN 5905-01-158-2347
NSN 4140-01-410-7626