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 
Spain 
Morocco 
Republic of Korea 
Greece Classification: Gaskets, washers and other seals, of vulcanized rubber other than hard rubber
NSN 5905-01-185-4150
NSN 6240-01-156-8208
NSN 6110-01-610-9375
NSN 6685-01-387-2944
NSN 4140-01-460-0440
NSN 6145-01-248-7887
NSN 5925-01-226-5942
NSN 5915-01-167-8174
NSN 5925-00-102-9390
NSN 5925-01-263-5990
NSN 5930-01-115-2616
NSN 5910-01-187-9069