A cylindrical-shaped nut, the end opposite the bearing surface being designed with an internal socket or splines for use with an inserted wrench.
NSN 5925-01-004-9293
NSN 5925-00-050-8289
NSN 6220-01-484-2153
NSN 5945-01-006-9422
NSN 5985-01-341-7387
NSN 6240-01-272-9019
NSN 6130-01-279-1903
NSN 5925-00-110-7364
NSN 4140-01-458-0356
NSN 6685-00-425-1335
NSN 6135-01-421-4855
NSN 5996-01-199-6733