A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5925-01-322-9473
NSN 6130-01-021-4980
NSN 6135-01-633-8502
NSN 5935-01-501-5608
NSN 2925-01-436-7325
NSN 5925-00-286-8502
NSN 6110-01-437-3174
NSN 5930-01-406-4281
NSN 5935-01-026-6484
NSN 5905-00-263-3453
NSN 6240-01-263-0123
NSN 5920-00-585-0104