For 12 screw size
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.
Classification: Washers other than lock washers, iron or steel
NSN 5835-01-384-3206
NSN 6650-01-505-5531
NSN 5905-01-393-5029
NSN 6610-01-142-3633
NSN 6220-00-767-5080
NSN 5965-00-067-6780
NSN 5930-00-420-1385
NSN 4140-01-067-8986
NSN 6320-01-381-7023
NSN 5930-01-303-0979
NSN 5835-01-544-5183
NSN 5915-01-577-2177