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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Lithuania 
Poland 
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Brazil 
Spain 
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Israel 
Singapore 
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Morocco 
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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 6110-01-502-5617
NSN 2925-01-196-6187
NSN 5910-01-262-8254
NSN 6135-00-403-0213
NSN 6620-00-620-3089
NSN 5915-01-399-5217
NSN 5965-01-130-8511
NSN 7035-00-535-8109
NSN 5925-01-539-0576
NSN 5998-00-097-8801
NSN 6110-00-003-8586
NSN 7035-01-620-2082