A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5975-01-537-4310
NSN 5960-01-360-4107
NSN 5920-01-538-2269
NSN 5930-01-481-4233
NSN 5895-00-411-4023
NSN 6220-00-397-6910
NSN 5855-00-832-9341
NSN 6610-00-225-9886
NSN 6135-01-394-6731
NSN 6145-01-089-1658
NSN 5975-00-137-0377
NSN 4140-00-336-1728