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.
Israel 
Malaysia 
New Zealand 
Germany 
Portugal Classification: Cotters, cotter-pins, washers and similar articles, of aluminum
NSN 7035-01-091-1929
NSN 6105-01-250-5826
NSN 5935-01-023-1445
NSN 6105-00-469-2293
NSN 6220-01-076-4383
NSN 6240-01-449-2883
NSN 5950-01-574-4450
NSN 6320-01-246-4390
NSN 5996-01-499-1244
NSN 5915-00-192-3109
NSN 4140-00-931-9638
NSN 5965-00-799-5490