I do wish people wouldn’t call it “threading” a bolt, drives me bonkers .
ditto 😡
I assume it comes from ‘cross-threaded’.
My general guide to fixing thread problems:
1. if you put the bolt in a bit wonky and it jams then you have cross threaded it – ie cut a new thread across the existing one. Best way to fix this is with a tap and carefully re-establish the original thread path. If you have access to the hole from the other end then go from that end.
2. if you strip the thread then see if there is enough thread to use a longer bolt – if so is it safe to do so? ie a non-structural item. Other solution in re-drill and tap to a larger size if you have enough material to do so or drill and fit a helicoil if that is the best route – eg if you have to stick with the original size bolt.
Other solutions are fit a washer and nut to the other side if possible, bond in a stud etc etc.