A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5998-00-553-9535
NSN 5925-01-118-2484
NSN 5998-01-108-4779
NSN 6240-01-574-0354
NSN 5915-01-357-0168
NSN 5945-01-413-2438
NSN 5965-01-064-2107
NSN 4140-01-625-0441
NSN 6685-01-345-0826
NSN 5950-00-075-0425
NSN 6150-01-189-1528
NSN 5915-00-389-1126