A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 7035-01-432-4605
NSN 6685-00-557-0760
NSN 5990-00-147-3144
NSN 5999-01-506-3726
NSN 6105-00-945-8214
NSN 5920-01-143-5002
NSN 5996-00-433-5579
NSN 5835-01-294-5753
NSN 5960-00-452-0452
NSN 6320-00-646-3311
NSN 5945-01-382-1421
NSN 2925-00-987-9595