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 5965-00-651-4350
NSN 5960-01-238-5046
NSN 6220-01-594-0991
NSN 6645-01-060-7988
NSN 6645-01-234-7459
NSN 5925-01-026-9649
NSN 5910-00-637-2609
NSN 6105-00-162-2060
NSN 5915-01-468-4907
NSN 5855-00-357-1158
NSN 5920-01-457-8115
NSN 5985-00-246-3875