As differentiated by fleet ballistic missile quality as identifed by quality control no. Poso 905138
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: Cotters, cotter-pins, washers and similar articles, of aluminum
NSN 5855-00-444-2298
NSN 5935-00-274-7348
NSN 6685-00-122-4913
NSN 6620-01-421-3917
NSN 5975-01-126-0180
NSN 6130-00-840-8886
NSN 5920-00-322-8618
NSN 5998-00-959-2283
NSN 5960-01-456-1735
NSN 6620-01-421-3917
NSN 5975-00-933-8982
NSN 5910-01-462-4753