A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6645-01-039-0058
NSN 5965-00-172-5103
NSN 5935-00-957-5224
NSN 5910-01-005-4978
NSN 4140-01-481-7019
NSN 6610-01-144-1951
NSN 6145-00-090-5411
NSN 6130-01-599-9431
NSN 5985-01-272-0320
NSN 6220-01-600-9687
NSN 5960-00-951-9551
NSN 5945-00-619-3553