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 5990-00-110-1153
NSN 5935-00-817-6275
NSN 6145-01-279-0551
NSN 5925-01-532-3196
NSN 6220-01-600-0257
NSN 5855-00-631-4565
NSN 6240-01-200-1663
NSN 5985-01-416-1945
NSN 5965-01-548-2574
NSN 6135-01-611-0125
NSN 5910-01-491-0861
NSN 6130-00-216-0281