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 6610-00-641-3015
NSN 5945-00-108-7048
NSN 6110-01-325-9847
NSN 5945-01-411-2822
NSN 6685-01-159-9850
NSN 5950-00-855-8357
NSN 7035-00-179-3924
NSN 5920-01-307-3866
NSN 5835-01-200-5069
NSN 5855-01-473-2035
NSN 5965-01-215-0993
NSN 5895-01-196-4845