A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6130-01-020-7307
NSN 5998-01-263-2497
NSN 5960-01-343-5912
NSN 5975-00-956-6105
NSN 5935-01-012-0856
NSN 5999-00-631-9315
NSN 5950-01-357-1089
NSN 7035-00-679-9027
NSN 6220-01-135-6092
NSN 6645-01-049-6116
NSN 5855-01-274-2307
NSN 6105-01-265-8083