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 5990-01-314-0228
NSN 5915-01-300-5617
NSN 5998-00-057-3702
NSN 6320-01-285-1922
NSN 4140-01-289-7912
NSN 5999-00-119-3487
NSN 6110-01-452-7908
NSN 7035-00-300-3208
NSN 5910-01-425-6127
NSN 5920-01-396-0124
NSN 5915-00-050-5014
NSN 6150-01-573-2775