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 6620-01-025-1443
NSN 6320-01-495-1244
NSN 6135-01-449-0625
NSN 6135-01-633-8502
NSN 6685-01-503-5062
NSN 5975-01-434-9054
NSN 6105-00-255-2153
NSN 6650-01-355-1271
NSN 5985-01-342-1365
NSN 6105-00-227-6511
NSN 6645-01-562-7154
NSN 5990-01-171-3547