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.
Dept. of the Navy Classification: Gaskets, washers and other seals, of vulcanized rubber other than hard rubber
NSN 5990-01-516-9665
NSN 5930-01-260-3836
NSN 6220-01-032-5646
NSN 4140-01-632-6958
NSN 5925-01-469-6068
NSN 5990-00-576-4882
NSN 6145-01-010-3402
NSN 7035-00-902-8995
NSN 5999-01-250-3266
NSN 5925-01-385-6240
NSN 7035-01-258-7661
NSN 2925-01-507-7234