A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5835-00-518-4507
NSN 5965-00-170-5254
NSN 6110-01-178-5996
NSN 6650-01-551-2097
NSN 5835-01-026-0670
NSN 6110-01-209-0259
NSN 5975-00-960-2571
NSN 5945-00-385-3683
NSN 5930-01-599-0684
NSN 6105-01-138-4894
NSN 6130-01-563-8799
NSN 5960-01-217-5850