A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5998-01-289-4275
NSN 6135-00-613-1068
NSN 4140-01-228-1261
NSN 6145-01-568-5428
NSN 6320-00-905-0543
NSN 4140-00-554-3915
NSN 6685-00-247-8703
NSN 6105-01-142-3199
NSN 6320-00-483-0451
NSN 5985-00-479-1295
NSN 5945-01-017-8020
NSN 6645-00-315-9254