Originally Posted by
Chev. William
3/4-10 is UNC, 3/4-16 is UNF, so you are probably thinking of easy to find taps and dies.
My personal thought is to go with 3/4-20 UNEF as even easier, just takes more Looking for the tap and die to cut them. generally a 3/4 diameter Length of thread will give full fastener strength but a full diameter length would yield a 'safety margin' against stripping.
By turning a "root diameter" Groove for the die to run its tapered section on to at the End of the threaded section you can end up with full depth threads for the full threaded length of the barrel tenon and a Square face to tighten the "receiver" against.
Best Regards,
Chev. William