A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5990-00-973-8072
NSN 6105-00-066-0925
NSN 4140-00-560-8166
NSN 6650-01-024-7903
NSN 6220-01-350-5839
NSN 6150-01-334-2562
NSN 5950-00-737-5768
NSN 6110-01-274-8039
NSN 6240-01-227-4178
NSN 6610-01-454-5552
NSN 4140-01-569-9714
NSN 6650-01-588-0883