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.
Germany 
Portugal 
Italy Classification: Washers other than lock washers, iron or steel
NSN 5925-01-535-4409
NSN 5855-01-654-0546
NSN 5990-01-400-3299
NSN 5895-00-518-1593
NSN 5960-00-183-8016
NSN 5855-00-482-9876
NSN 6150-01-481-4183
NSN 6620-01-280-3516
NSN 6685-00-647-3883
NSN 5985-01-298-3944
NSN 4140-01-431-9065
NSN 5990-01-036-8080