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.
Germany 
Italy 
Greece Classification: Cotters, cotter-pins, washers and similar articles, of aluminum
NSN 5925-01-353-2766
NSN 2925-01-500-3300
NSN 5998-01-551-3173
NSN 6145-01-362-1649
NSN 5910-01-500-6680
NSN 6240-01-526-9660
NSN 6610-01-233-0949
NSN 6685-00-817-5694
NSN 5935-01-323-4851
NSN 2925-01-175-1217
NSN 6320-01-443-6975
NSN 5945-01-410-8747