A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5920-00-913-0475
NSN 5935-01-541-9041
NSN 7035-01-227-2546
NSN 6110-01-592-7946
NSN 6240-01-092-3509
NSN 6150-01-377-0520
NSN 5998-01-142-2883
NSN 5855-00-922-6459
NSN 6135-00-010-5275
NSN 5999-00-515-7354
NSN 6110-01-445-6967
NSN 6650-01-567-5855