NP231 shifter "stud" thread size ??

Hey guys! Just got another XJ.. This ones gonna be long armed with waggy 44's and boatsides. Just a quick question..

Just did the NP231 SYE and rebuild but somehow lost the nut that secures the linkage the stud on the NP231. Just need a thread size for it if anyone knows. Have looked around with no luck.

Thank you!

.375-24 self locking

otherwise known as 3/8"-24 UNC for those that don't speak decimals