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 6650-00-960-5040
NSN 5985-01-581-0114
NSN 6685-01-281-8860
NSN 4140-01-634-0330
NSN 4140-00-489-3020
NSN 5855-00-089-3974
NSN 5975-01-444-6481
NSN 5905-00-302-5136
NSN 4140-01-441-3006
NSN 5998-01-423-0685
NSN 5960-01-034-0408
NSN 6610-00-305-5447