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 5925-01-119-3429
NSN 6320-00-174-1362
NSN 5920-00-425-2878
NSN 6105-01-324-0405
NSN 6645-00-871-1187
NSN 5920-01-542-3150
NSN 5965-01-167-8513
NSN 5930-01-592-5352
NSN 5965-01-177-4872
NSN 5915-01-250-3364
NSN 6105-00-481-0781
NSN 5975-00-411-6294