Item previously known as: copper washer - 20, a
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 4140-01-199-5196
NSN 5915-01-442-8785
NSN 6620-01-365-1499
NSN 5965-01-294-6152
NSN 6110-00-233-4589
NSN 5915-01-094-6921
NSN 6150-01-144-4738
NSN 5920-01-424-3721
NSN 5960-01-088-6553
NSN 5945-01-345-2113
NSN 5975-00-400-2630
NSN 6130-00-021-5372