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 4140-01-175-3883
NSN 6240-00-423-9575
NSN 6220-01-186-2529
NSN 6620-01-590-7035
NSN 6320-01-207-0636
NSN 5960-00-036-8187
NSN 5950-01-513-0136
NSN 6150-01-181-0086
NSN 5935-00-248-2071
NSN 6320-00-405-2348
NSN 5905-01-187-8554
NSN 5998-01-618-6547