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 Army Classification: Cotters, cotter-pins, washers and similar articles, of aluminum
NSN 5920-01-016-7030
NSN 5920-00-611-6728
NSN 5920-00-134-0395
NSN 6610-01-416-0652
NSN 5975-01-645-0195
NSN 2925-01-500-0730
NSN 7035-01-229-5830
NSN 5910-01-521-3684
NSN 5835-01-244-8532
NSN 5910-00-212-5969
NSN 2925-01-628-4219
NSN 5999-01-136-3417