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 5935-00-795-7438
NSN 6685-01-485-2314
NSN 6320-01-335-8336
NSN 5920-00-544-6564
NSN 5930-00-846-4201
NSN 7035-01-593-0151
NSN 6110-01-485-0124
NSN 6135-01-532-0775
NSN 5905-01-348-8919
NSN 5920-01-490-7329
NSN 5895-01-517-6156
NSN 6650-01-214-1710