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 5950-01-391-8101
NSN 5985-00-466-3574
NSN 6610-00-079-1508
NSN 5935-01-265-9368
NSN 6685-01-158-0975
NSN 5910-01-385-5020
NSN 5975-01-518-8341
NSN 4140-01-549-4468
NSN 6135-01-294-2131
NSN 5920-01-172-6358
NSN 5895-01-372-9255
NSN 6220-01-420-7812