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 5835-00-257-2852
NSN 5985-00-985-6159
NSN 5985-00-256-8449
NSN 4140-01-320-6021
NSN 6145-01-156-0284
NSN 5935-01-218-5001
NSN 6110-00-187-4537
NSN 6110-01-646-4195
NSN 5960-01-279-2589
NSN 5920-01-545-7701
NSN 6610-00-208-5318
NSN 5855-00-631-4565