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.
Austria 
Brazil 
Spain 
Malaysia 
Australia 
Belgium 
France 
Germany 
Republic of Korea 
Italy 
Norway 
Turkey Classification: Cotters, cotter-pins, washers and similar articles, of aluminum
NSN 6105-01-309-5313
NSN 5835-01-184-3659
NSN 2925-01-391-1540
NSN 2925-01-473-9544
NSN 6620-01-311-3516
NSN 5985-01-480-3640
NSN 5915-01-579-4810
NSN 5985-01-552-0960
NSN 6135-01-116-3385
NSN 6220-01-604-6477
NSN 6145-01-463-0581
NSN 5945-01-431-3693