Just as an interesting aside, it is possible to have a "stripped bottom bracket" in the sense that you have an Ashtabula crank set with bad threads.
This happens when the threads to get the cones on are ok, but at the point where they sit for running are so worn or damaged that the cone comes loose and then the cranks just free spin and rattle about in the dead zone where the bad threads are. Usually its the threads used to mount the cones (outside) that are bad but I have seen a crank or two where the threads in the running zone are bad. You try to save them with a needle file and loupe, but sometimes a new crank is the best way for that.