A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6685-01-351-4586
NSN 5895-01-468-6215
NSN 4140-01-513-9139
NSN 6320-01-359-3921
NSN 6240-00-881-9624
NSN 6240-01-453-6482
NSN 5998-01-159-6524
NSN 5975-00-442-0821
NSN 5910-01-263-3729
NSN 6135-00-097-8162
NSN 5920-01-466-9498
NSN 6610-00-608-1907