A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5975-01-420-5273
NSN 5855-01-523-0653
NSN 5950-00-471-3750
NSN 5965-01-513-3022
NSN 6650-01-290-4001
NSN 5998-01-605-6162
NSN 5998-01-096-1670
NSN 5935-00-828-1877
NSN 6610-00-464-6924
NSN 5960-00-070-4399
NSN 6150-01-441-0823
NSN 6685-00-316-3784