A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 2925-01-187-0423
NSN 5975-01-457-8521
NSN 6105-01-634-0322
NSN 2925-01-528-7333
NSN 5925-01-576-8516
NSN 5998-01-393-4473
NSN 6320-01-583-6809
NSN 6240-01-657-0501
NSN 6620-01-332-5815
NSN 5910-01-512-0312
NSN 6240-01-463-4877
NSN 6110-01-514-3998