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 5895-01-406-4601
NSN 6145-01-168-9296
NSN 6220-01-166-0004
NSN 5975-01-357-5941
NSN 6685-01-628-4794
NSN 4140-00-295-0787
NSN 5945-01-608-9324
NSN 5985-01-279-1069
NSN 6105-00-775-2925
NSN 6320-01-484-7734
NSN 5920-01-454-2791
NSN 6620-00-676-9563