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.
Austria 
New Zealand 
Republic of Korea 
Portugal 
Greece Classification: Copper washers including spring washers not threaded
NSN 5998-00-245-3128
NSN 6105-01-558-3072
NSN 5905-01-116-4120
NSN 7035-01-574-0062
NSN 6105-01-335-5618
NSN 7035-01-302-5359
NSN 5910-01-004-9985
NSN 5985-00-942-3608
NSN 6650-01-330-2617
NSN 5910-01-424-1435
NSN 5996-01-400-3558
NSN 6110-01-231-7360