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 5935-01-492-1698
NSN 5945-01-227-3056
NSN 5835-00-368-4182
NSN 5910-00-428-4017
NSN 6240-01-055-0801
NSN 6110-00-927-8186
NSN 5855-01-136-9532
NSN 7035-00-421-8710
NSN 6610-01-310-0553
NSN 5996-00-645-9957
NSN 5996-01-207-2724
NSN 5975-01-451-2090