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 5985-01-113-7113
NSN 5960-00-412-1202
NSN 5996-01-340-7810
NSN 5895-01-058-7456
NSN 6220-00-208-8735
NSN 5999-01-024-6927
NSN 6145-01-137-4473
NSN 5985-00-113-3417
NSN 5945-00-959-4997
NSN 6320-01-592-6248
NSN 5996-00-518-4880
NSN 6685-00-276-9889