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 5960-01-053-4358
NSN 5996-00-213-7121
NSN 5990-01-053-5115
NSN 5915-01-261-0735
NSN 4140-01-185-1159
NSN 5910-01-525-3725
NSN 5945-00-636-9934
NSN 5960-01-624-1170
NSN 5920-01-660-7286
NSN 6145-00-724-1107
NSN 5945-00-378-0281
NSN 5905-00-935-6954