Rockwell c hardness 43.0 min, 49.0 max
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 6220-00-635-1317
NSN 5990-00-578-6254
NSN 5975-00-794-8260
NSN 5895-00-974-8982
NSN 6320-01-495-1244
NSN 6320-00-036-3688
NSN 5996-01-553-4027
NSN 6610-01-373-5949
NSN 5965-01-552-6197
NSN 5996-01-116-3404
NSN 5835-00-807-5632
NSN 4140-01-385-9728