A nut having 12 drive points and 24 sides. The bearing surface may be washer faced. An integral locking feature is incorporated in the design of the head or in the threads.
NSN 6650-01-660-7801
NSN 5985-00-168-8384
NSN 5945-00-941-5964
NSN 5985-00-932-2702
NSN 6110-01-358-4498
NSN 6135-00-932-3136
NSN 6240-00-482-1142
NSN 5996-01-367-6557
NSN 5915-01-410-7822
NSN 6240-00-880-8700
NSN 6105-01-106-0060
NSN 6110-00-232-5406