A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5935-01-341-2668
NSN 5925-01-260-3739
NSN 6130-01-029-3357
NSN 6320-01-307-0467
NSN 6110-00-764-9362
NSN 5905-01-396-2027
NSN 6610-00-913-1704
NSN 6610-01-416-2738
NSN 5960-00-717-2209
NSN 2925-00-905-2655
NSN 6135-01-548-1423
NSN 6105-00-664-1292