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 4140-01-157-6947
NSN 6620-01-380-0161
NSN 6130-01-494-0869
NSN 5945-01-440-2065
NSN 5915-00-406-3959
NSN 5915-00-244-2835
NSN 6320-01-316-6864
NSN 5945-00-984-5754
NSN 6130-01-629-9181
NSN 5965-01-532-5894
NSN 5990-01-609-4793
NSN 6650-01-540-5157