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 7035-01-158-8860
NSN 5925-01-529-2988
NSN 6130-01-465-2377
NSN 2925-01-038-7625
NSN 6130-01-521-3157
NSN 5945-01-269-6007
NSN 5998-01-138-6225
NSN 6645-01-283-2080
NSN 5915-01-056-4698
NSN 5999-00-594-3412
NSN 6130-01-649-0661
NSN 5915-00-374-0935