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 
France 
Greece Classification: Cotters, cotter-pins, washers and similar articles, of aluminum
NSN 6650-00-942-8931
NSN 6320-00-483-0451
NSN 6610-01-425-1523
NSN 5950-01-018-3414
NSN 5910-01-527-6843
NSN 5990-01-354-4812
NSN 5895-01-534-1431
NSN 6320-01-462-2295
NSN 6645-00-442-0475
NSN 6685-00-539-8060
NSN 6320-01-206-8930
NSN 6645-01-555-4356