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 6220-00-514-4116
NSN 6610-01-370-2405
NSN 5915-01-091-5808
NSN 6135-00-299-6918
NSN 6110-01-195-7628
NSN 5999-01-360-6276
NSN 7035-00-413-0992
NSN 6650-00-077-0638
NSN 5965-01-508-1093
NSN 6145-01-109-2299
NSN 5990-01-309-3740
NSN 6145-00-115-0560