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 5996-00-143-4783
NSN 5999-01-502-3645
NSN 5985-00-924-0719
NSN 5950-01-098-1959
NSN 5945-00-028-1578
NSN 5910-01-631-4352
NSN 5930-01-407-8067
NSN 7035-00-803-3056
NSN 5915-01-184-6270
NSN 5895-01-175-3996
NSN 5930-01-350-2045
NSN 5930-01-406-3468