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 6645-01-128-9353
NSN 5999-01-559-4665
NSN 5975-01-223-7338
NSN 5855-00-403-1031
NSN 6135-00-942-7970
NSN 6135-00-152-8729
NSN 6610-01-113-2726
NSN 6650-01-603-3183
NSN 5925-01-471-0376
NSN 5925-00-051-4892
NSN 5835-00-247-0161
NSN 5855-01-144-0423