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.
Classification: Copper washers including spring washers not threaded
NSN 4140-01-303-3173
NSN 5998-00-315-3595
NSN 6110-01-227-5465
NSN 5855-01-408-3154
NSN 6220-00-191-9446
NSN 5960-01-287-4187
NSN 5930-01-098-2521
NSN 6645-01-021-2225
NSN 5925-01-257-7936
NSN 5950-01-254-2155
NSN 6645-01-658-3187
NSN 6240-01-106-6113