A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6145-01-634-0388
NSN 5998-01-514-1323
NSN 6685-01-265-3754
NSN 6150-01-445-6019
NSN 6105-00-132-1570
NSN 6130-01-256-2295
NSN 5930-01-023-4885
NSN 5895-00-433-5566
NSN 5835-01-608-8868
NSN 6620-01-128-4462
NSN 5935-01-485-5128
NSN 5999-00-521-3408