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 6220-00-225-8345
NSN 6650-01-399-8552
NSN 5990-01-128-7599
NSN 5855-00-494-9581
NSN 5910-01-479-5743
NSN 5975-01-100-1063
NSN 5920-00-345-5833
NSN 5950-00-387-0489
NSN 5965-00-949-5765
NSN 5935-00-237-5124
NSN 6110-01-313-9030
NSN 6105-01-152-1510