The item is a flight safety critical aircraft part (fscap).
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 5920-01-131-4374
NSN 6110-01-337-5665
NSN 6135-01-354-5535
NSN 6135-00-505-0679
NSN 6645-00-503-1379
NSN 6610-01-041-8015
NSN 5999-00-479-6700
NSN 6110-01-141-7745
NSN 4140-01-331-8305
NSN 6135-00-998-5884
NSN 6110-01-629-3278
NSN 5998-01-504-3756