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 5925-00-219-2908
NSN 5945-00-938-4959
NSN 4140-00-736-8813
NSN 5965-00-888-2643
NSN 7035-01-494-7900
NSN 6105-01-364-8811
NSN 5996-01-218-6468
NSN 6645-01-180-6219
NSN 6145-01-495-8768
NSN 6150-00-264-5978
NSN 5990-01-183-6478
NSN 5985-01-327-2594