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.
Republic of Korea 
Greece 
Turkey Classification: Gaskets, washers and other seals, of vulcanized rubber other than hard rubber
NSN 6105-01-345-2839
NSN 5998-01-466-4417
NSN 6240-01-412-6426
NSN 5930-00-230-2691
NSN 5895-01-365-7365
NSN 5935-01-432-9840
NSN 6145-01-161-1541
NSN 5915-00-649-0561
NSN 5915-00-296-5031
NSN 6220-01-033-2082
NSN 5960-00-890-9032
NSN 5950-01-107-4815