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.
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National Aeronautics and Space Administration 
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Brazil 
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Denmark 
Greece 
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NATO Maintenance and Supply Agency Classification: Washers other than lock washers, iron or steel
NSN 5925-01-283-9330
NSN 6220-01-407-3366
NSN 6105-01-265-0553
NSN 5835-01-478-0157
NSN 7035-01-384-4383
NSN 5999-00-661-0954
NSN 6150-01-313-0323
NSN 5930-00-085-0526
NSN 5915-01-313-1625
NSN 5975-01-378-6355
NSN 5945-01-025-1163
NSN 5835-01-608-4285