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 6620-01-281-6386
NSN 6610-01-426-5090
NSN 5996-01-386-4230
NSN 5910-00-227-9795
NSN 5965-01-433-4413
NSN 5935-01-431-7047
NSN 2925-01-437-9041
NSN 6105-01-208-4930
NSN 5925-01-100-4029
NSN 6220-01-283-3963
NSN 6105-01-173-4981
NSN 2925-01-408-9485