A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6150-01-447-0880
NSN 6645-01-418-1657
NSN 5998-00-925-2992
NSN 2925-01-236-3547
NSN 5990-01-265-8082
NSN 6145-00-174-9344
NSN 6105-00-189-0515
NSN 6220-00-541-8515
NSN 6650-01-645-6876
NSN 6150-00-220-2038
NSN 6145-01-350-4677
NSN 5855-01-371-9776