A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5996-01-633-7979
NSN 5855-01-521-4836
NSN 5945-01-518-8316
NSN 5996-01-122-3768
NSN 6320-01-476-7702
NSN 5960-00-310-3844
NSN 6645-01-258-5558
NSN 6105-01-416-4029
NSN 5996-00-277-7384
NSN 6110-01-466-4345
NSN 5910-00-518-2206
NSN 5935-01-152-2606