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.
Dept. of the Army 
Dept. of the Air Force 
Austria 
Lithuania 
Singapore 
Thailand 
Canada 
Portugal 
Denmark 
Greece 
Turkey Classification: Washers other than lock washers, iron or steel
NSN 5925-01-435-7197
NSN 6135-00-951-3426
NSN 6135-01-648-4875
NSN 5925-01-142-1996
NSN 2925-00-957-7329
NSN 6320-00-036-3688
NSN 5935-00-528-8921
NSN 6610-01-406-6696
NSN 6220-01-507-5815
NSN 5855-01-535-0971
NSN 6220-01-274-3545
NSN 5975-01-441-2181