A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 6150-01-435-4483
NSN 4140-01-295-8264
NSN 6650-01-422-3395
NSN 5905-01-319-9875
NSN 5998-01-206-4672
NSN 6110-01-317-8073
NSN 5920-00-575-8826
NSN 5996-01-058-3156
NSN 6135-00-474-1397
NSN 6220-01-607-8477
NSN 6645-01-054-4423
NSN 2925-01-168-6253