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 4140-00-833-6239
NSN 6135-00-643-4843
NSN 6650-01-165-2175
NSN 5855-01-236-9645
NSN 5975-00-348-7427
NSN 5960-00-518-3091
NSN 5998-01-283-4469
NSN 6150-00-096-6477
NSN 5925-01-413-1638
NSN 5905-01-469-6376
NSN 5965-00-005-7899
NSN 6610-00-305-2627