A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5945-00-130-2618
NSN 6685-01-086-4715
NSN 5965-01-523-5998
NSN 4140-01-155-5620
NSN 5925-01-643-5706
NSN 6240-01-394-4212
NSN 6650-00-227-8743
NSN 6130-01-413-3078
NSN 5975-00-186-8884
NSN 6110-00-724-3136
NSN 5960-01-513-3230
NSN 6685-00-828-7126