Originally Posted by GBagRacing
I have found that threadlock can help as a quick fix in plastic parts that have been lightly stripped. Ie: the new plastic part didn't come in the mail before the weekend race or the local shop couldn't get it in till after the weekend. This also depends on where the screw is. If it's a high stress area like a plastic ball cup for instance, it wont work but if it's one of the 4 screws that hold the cross brace you can get away with it if your in a pinch.
Threadlock weakens plastic. You're actually making your stripped part worse that way. I wouldn't recommend further use of threadlock on your stripped plastic parts. Jamea is right, use CA glue!