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 6150-01-641-8701
NSN 5996-01-076-0905
NSN 6240-01-453-3198
NSN 5990-01-147-5225
NSN 6110-00-589-3134
NSN 5975-01-260-9144
NSN 5835-01-027-1828
NSN 5975-01-634-0678
NSN 6135-00-010-5275
NSN 7035-00-763-6180
NSN 6685-00-494-3153
NSN 7035-00-369-6346