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 5920-01-192-8605
NSN 5835-00-034-4976
NSN 5895-01-561-0534
NSN 5920-01-425-7496
NSN 2925-01-543-0073
NSN 6135-01-539-5098
NSN 5996-01-094-5587
NSN 5990-01-411-5930
NSN 5996-01-163-6773
NSN 5996-00-491-1142
NSN 5945-01-360-8778
NSN 6645-01-067-0780