A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6110-01-595-9620
NSN 6130-01-329-8408
NSN 6650-01-206-0037
NSN 6320-01-435-5991
NSN 5996-00-707-6228
NSN 5950-00-240-2624
NSN 5855-00-118-8762
NSN 5965-01-646-2840
NSN 6145-01-382-1681
NSN 6105-00-316-0036
NSN 5975-01-065-1796
NSN 6220-01-492-4825