A locking device with two keys spaced approximately 180 degrees center to center and protruding from the seating surface of the ring. When installed the keys mate with companion keyways in the external threads of screw thread inserts, locked-in studs, or similar type items, and cut through sufficient threads of the parent material tapped hole to provide a positive lock between the threaded bodies.
NSN 6150-00-100-4757
NSN 6645-01-177-6021
NSN 6105-00-186-0161
NSN 5930-00-099-5815
NSN 5920-01-088-7958
NSN 5920-01-486-1626
NSN 6110-01-278-6890
NSN 5915-01-294-2296
NSN 5990-00-201-1162
NSN 5985-00-952-0854
NSN 6130-01-089-9646
NSN 5960-01-276-2828