A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5996-01-167-8914
NSN 6110-01-616-4929
NSN 6240-01-176-9037
NSN 6645-01-371-1632
NSN 6145-01-476-7814
NSN 6130-00-097-9674
NSN 5996-01-154-1064
NSN 6650-01-604-9073
NSN 6135-01-483-5269
NSN 7035-01-146-7096
NSN 5925-00-103-5097
NSN 6220-01-634-0660