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 5835-00-140-8646
NSN 5999-01-110-3513
NSN 6130-01-616-4098
NSN 5950-01-534-4840
NSN 5975-00-775-2455
NSN 6220-00-184-6179
NSN 5950-01-399-8700
NSN 5945-00-619-3553
NSN 6135-00-900-2139
NSN 6110-01-641-9750
NSN 6620-01-468-0362
NSN 6320-01-216-1678