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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Austria 
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Romania 
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Brazil 
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Columbia 
Israel 
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Singapore 
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France 
Germany 
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NATO Maintenance and Supply Agency Classification: Washers other than lock washers, iron or steel
NSN 6320-00-674-1361
NSN 5975-01-486-5320
NSN 6645-01-546-3212
NSN 2925-01-376-9236
NSN 5920-01-598-4033
NSN 4140-00-133-1780
NSN 5960-01-632-6576
NSN 5855-01-333-7108
NSN 5950-01-641-2901
NSN 5999-00-120-0206
NSN 5930-01-111-9515
NSN 6320-00-925-0558