A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6645-01-421-4007
NSN 6135-01-187-4382
NSN 5965-01-045-0247
NSN 6220-01-104-5075
NSN 5999-00-269-5320
NSN 5920-00-753-5113
NSN 6135-01-326-2536
NSN 6645-00-057-3499
NSN 5835-01-208-1939
NSN 5990-00-724-4375
NSN 5835-01-604-2279
NSN 5990-00-410-6202