A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6110-01-063-4168
NSN 5998-01-381-1638
NSN 5998-00-463-1122
NSN 5910-00-840-0199
NSN 6685-01-063-7425
NSN 6220-01-047-7325
NSN 6150-00-734-5281
NSN 6105-00-367-1984
NSN 5915-01-651-8274
NSN 5920-01-062-8731
NSN 6320-01-476-7702
NSN 6110-01-278-5645