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 5998-00-553-9535
NSN 5999-00-839-9004
NSN 6685-01-568-3399
NSN 5855-01-487-5048
NSN 6650-01-053-1816
NSN 6110-00-596-9124
NSN 2925-01-290-4562
NSN 6620-01-283-5627
NSN 6110-00-518-2998
NSN 6320-01-388-1067
NSN 5999-01-389-2428
NSN 2925-01-177-1598