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 5910-01-067-2149
NSN 5975-01-239-9858
NSN 6685-00-286-8481
NSN 6240-00-076-2752
NSN 6145-01-087-9773
NSN 5998-00-925-2567
NSN 5975-01-053-4115
NSN 7035-01-556-6860
NSN 5985-00-929-6174
NSN 6220-01-437-9755
NSN 6620-01-114-6374
NSN 5930-01-101-5151