A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5998-01-415-0267
NSN 5925-01-206-9991
NSN 6130-01-562-3695
NSN 6320-00-937-5625
NSN 5895-01-003-8185
NSN 6150-01-462-5674
NSN 5915-01-036-5175
NSN 5935-01-519-0466
NSN 5835-01-263-1293
NSN 6610-01-121-0190
NSN 6145-01-210-4000
NSN 6150-00-317-3488