A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6105-01-141-7727
NSN 5925-01-445-2948
NSN 5895-01-451-4341
NSN 5945-00-269-5375
NSN 6130-01-451-4256
NSN 5855-01-655-1806
NSN 6620-01-034-4539
NSN 6145-00-482-1724
NSN 6130-01-152-2019
NSN 5835-01-363-4527
NSN 6105-01-429-6719
NSN 5835-01-147-7526