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 2925-01-280-1911
NSN 5945-01-337-6473
NSN 6645-01-470-9599
NSN 5965-00-246-4767
NSN 6320-00-456-0836
NSN 6150-01-245-6148
NSN 5930-01-267-3974
NSN 5990-00-145-1187
NSN 6620-01-575-3634
NSN 5910-01-360-0623
NSN 5950-01-423-8936
NSN 6645-01-126-7743