The complete repair for stripped threads is to use a coil-type thread insert. These inserts will give the bolt hole completely new threads which accept the size of the original bolt. In order to use inserts, you must drill the damaged holes slightly larger so that it can take the thread insert.
What happens if a bolt is over tightened?
One of the most damaging ways to do that is by over-tightening, or over torquing the fastener. This can result in stripping screws, snapping screw heads and damaging pre-tapped threading.
How do you fix a stripped bolt hole in wood?
Cut some thin strips or shavings from a piece of scrap wood from the same (or similar) species of wood. Dip the tips of the strips into wood glue and tap them lightly into the hole with a hammer until the hole is filled. Let the glue dry for a few hours.
How do you fix a screw that keeps turning in metal?
Tighten a loose set screw by wrapping sewing thread around the screw threads and then installing the screw back into the screw hole. Screws that join pieces of metal can become loose over time, especially if the joint is under any kind of constant movement or stress.
What do you do with a stripped screw head?
Try a Rubber Band
A common household rubber band can do the trick. Simply place part of the rubber band over the head of the screw. Insert your screwdriver into the rubber band. Turn the screwdriver clockwise to remove the stripped screw.