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 5960-01-292-0027
NSN 5996-00-161-0148
NSN 5915-01-550-1879
NSN 6105-01-204-2920
NSN 2925-00-247-6248
NSN 5999-00-248-3227
NSN 6110-00-521-8932
NSN 5925-01-417-9203
NSN 5915-01-333-2205
NSN 5965-01-320-0260
NSN 7035-01-088-6415
NSN 6610-01-189-3001