A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5998-01-605-1593
NSN 5945-01-165-3066
NSN 6130-01-275-2174
NSN 6320-00-841-2279
NSN 6645-01-023-8724
NSN 5975-00-353-5589
NSN 4140-00-900-6102
NSN 6650-00-053-4907
NSN 5935-00-796-7250
NSN 6150-00-528-4175
NSN 5965-00-454-3444
NSN 6610-00-772-9049