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 6645-01-109-9552
NSN 5915-00-367-0054
NSN 5945-01-252-7786
NSN 6620-00-166-0556
NSN 5996-01-067-8716
NSN 5930-01-650-7940
NSN 5945-00-831-9130
NSN 6650-01-193-2144
NSN 6145-01-200-7936
NSN 2925-01-543-0073
NSN 5965-00-752-5823
NSN 5990-01-157-0441