A screw, (as modified) to which has been assembled one or more nonremovable washer(s).
NSN 5835-01-067-7770
NSN 6620-01-356-2374
NSN 5945-00-553-9963
NSN 5975-00-719-9793
NSN 6645-01-358-1474
NSN 5965-00-486-7907
NSN 6320-00-371-8335
NSN 6645-00-425-6199
NSN 6645-01-047-3026
NSN 5985-00-848-1325
NSN 5985-00-926-9676
NSN 6645-01-460-4339