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 5835-01-519-3834
NSN 5905-01-541-5010
NSN 5950-01-558-5007
NSN 6150-00-176-9112
NSN 5835-00-327-6192
NSN 7035-01-135-0050
NSN 5895-01-459-0181
NSN 6240-00-155-5817
NSN 5915-00-993-1825
NSN 6110-01-121-8318
NSN 5915-00-074-4387
NSN 5905-01-648-0238