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 5950-00-005-3245
NSN 6150-01-077-3963
NSN 6220-00-333-4568
NSN 5960-01-029-2940
NSN 5905-00-105-7623
NSN 5990-01-293-4817
NSN 5950-01-259-4731
NSN 5920-01-451-5595
NSN 5920-00-175-7987
NSN 5910-01-376-2932
NSN 5990-01-559-0578
NSN 5855-01-425-1330