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.
Belgium 
Germany 
Italy Classification: Washers other than lock washers, iron or steel
NSN 5945-01-225-0663
NSN 5960-00-689-9720
NSN 6685-01-513-6928
NSN 5975-00-269-4365
NSN 6145-01-067-8419
NSN 5999-01-260-2759
NSN 5950-01-274-1447
NSN 5915-00-128-8808
NSN 5905-01-513-1877
NSN 4140-01-055-6355
NSN 2925-01-448-2880
NSN 5985-00-558-7770