A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6685-01-500-8158
NSN 4140-01-546-8849
NSN 6650-01-337-9970
NSN 4140-01-395-6572
NSN 5935-01-038-8847
NSN 5935-00-248-5919
NSN 5920-01-084-9892
NSN 5915-00-619-3987
NSN 6220-01-624-2129
NSN 5905-01-658-9551
NSN 5996-00-729-1250
NSN 5999-00-420-3421