A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 2925-00-240-4483
NSN 5985-00-937-2135
NSN 5950-00-614-1103
NSN 5835-00-373-2671
NSN 5960-00-137-4751
NSN 6145-01-245-8856
NSN 5998-00-103-3736
NSN 6220-01-470-4166
NSN 5895-00-629-5222
NSN 5985-00-138-6022
NSN 6145-01-409-1685
NSN 6110-01-447-2770