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 5895-01-429-4556
NSN 5985-01-265-3744
NSN 6105-01-412-4584
NSN 5965-01-344-8592
NSN 6320-01-512-2031
NSN 6650-00-333-9044
NSN 5996-01-536-7969
NSN 6135-00-643-4843
NSN 5835-01-528-7454
NSN 6135-01-647-9338
NSN 6620-01-605-1465
NSN 6645-00-051-8888