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 5910-00-490-3943
NSN 6645-01-627-4123
NSN 5999-00-346-5954
NSN 5998-01-243-2688
NSN 5925-01-017-1036
NSN 5990-01-272-4091
NSN 5999-00-336-3237
NSN 6135-00-221-4720
NSN 5835-00-111-3419
NSN 5996-01-651-0056
NSN 6645-01-422-8078
NSN 6150-00-851-6542