A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6610-01-005-1190
NSN 5990-00-686-5868
NSN 5950-01-207-3058
NSN 6220-01-418-3508
NSN 5835-01-540-4995
NSN 5835-01-561-2959
NSN 6320-01-291-0960
NSN 6645-01-113-8979
NSN 7035-01-096-8912
NSN 5905-01-533-6814
NSN 5925-01-178-8962
NSN 5915-00-100-5239