A washer or cone or disk shape with a centrally located hole, designed to accommodate a flat or oval head screw and provide additional bearing area on the material being fastened. It may or may not have a flush flange feature.
Classification: Copper washers including spring washers not threaded
NSN 5985-01-534-7728
NSN 5835-01-631-7390
NSN 6105-01-462-7177
NSN 6130-01-246-5645
NSN 7035-01-206-2623
NSN 5835-00-905-7165
NSN 6650-01-564-3452
NSN 6110-00-678-0244
NSN 5960-00-188-8648
NSN 6145-01-541-2199
NSN 6220-01-212-3254
NSN 5975-01-479-6550