A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5990-00-471-4975
NSN 5905-00-049-7960
NSN 4140-01-383-8599
NSN 5920-01-412-1080
NSN 6220-01-572-2470
NSN 6240-01-629-9175
NSN 5999-01-613-2343
NSN 6650-01-449-1413
NSN 5996-01-322-4838
NSN 5855-00-631-4565
NSN 5920-00-624-3049
NSN 5910-01-106-3499