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 5990-00-945-3518
NSN 6145-01-277-8917
NSN 5985-01-459-9909
NSN 5990-01-565-2226
NSN 5930-01-554-2615
NSN 5905-01-169-2632
NSN 5835-01-647-6426
NSN 5930-01-198-7128
NSN 4140-01-141-2074
NSN 6320-01-493-4472
NSN 5945-00-542-3569
NSN 5950-00-203-4401