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 6240-00-946-0185
NSN 6145-01-302-9522
NSN 5945-00-945-7535
NSN 6240-01-394-5320
NSN 5975-01-648-5260
NSN 5920-00-964-9986
NSN 5855-00-869-3635
NSN 6110-01-050-8119
NSN 6650-01-399-8552
NSN 5985-01-099-1086
NSN 6240-00-170-5302
NSN 5930-00-513-6125