Re: stripped bold threats
You will probably have to run an appropriate tap in there to clean up the threads. Work slow, backing the tap out often to clean any shavings. If you have gone as far as you can with the tap and the screws still don't tighten, you may have to grind the tip of the tap off, to the point where the taper ends.
If you need a shoulder to cry on ...
... pull over to the side of the road!