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.
Dept. of the Army 
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Poland 
Brazil 
Spain 
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Turkey Classification: Washers other than lock washers, iron or steel
NSN 5910-01-467-0108
NSN 6220-00-405-4764
NSN 6320-01-544-6447
NSN 5930-00-567-5343
NSN 5835-01-392-0575
NSN 6685-01-059-1769
NSN 2925-01-118-6125
NSN 5985-01-417-3184
NSN 5945-01-050-0871
NSN 5950-00-004-7738
NSN 2925-00-149-0760
NSN 2925-01-513-9114