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 5999-00-116-3944
NSN 5895-01-119-1601
NSN 4140-01-168-8796
NSN 4140-01-290-4026
NSN 5975-01-133-8937
NSN 5945-00-188-8954
NSN 5945-00-389-4725
NSN 5965-01-221-0569
NSN 6130-01-629-2047
NSN 5920-00-752-3081
NSN 5950-01-115-4107
NSN 6110-00-740-1566