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 6685-01-584-2828
NSN 4140-01-358-5141
NSN 5985-01-392-0613
NSN 5935-00-877-2739
NSN 6105-01-351-4069
NSN 5950-00-010-3010
NSN 6135-01-040-1446
NSN 5915-01-468-9565
NSN 6130-00-936-0892
NSN 5925-01-239-6743
NSN 5950-01-291-3256
NSN 5930-00-439-8160