The Mr. Grip screw hole repair kit is intended to repair holes in wood that are stripped out. This is not recommended for use on a switch plate or electrical switch.
Regarding... "The Mr Grip screw hole repair kit is intended to repair holes in wood that are stripped out. They are not designed for metal holes. For this purpose, you may need to drill the hole larger and retap the threads in the next size up or use a nut and washer on the inside to secure the bracket." How do you "retap the threads in the next size up"? The screw goes into the "cavern" of the heater, so no way to get in there to use a nut and washer to secure it. Thank you!
better to use wood filler and start over . This is too big to use in screwholes that small
No. Stripped screw threads in metal are generally repaired by (1) re-tapping the hole for a larger screw (2) installing a thread insert (3) or using a nut and a bolt instead of a machine screw if there's room.
The direction to use the screw hole repair kit is to cut this product into strips to fit the hole, making sure they fit lengthwise into the hole, then insert the screw to tighten.
You may want to purchase a screw extractor to remove the stripped screw.
(1) Cut the strips with scissors to fit the hole. 2) Fit them lengthwise into the hole. Use one or more as needed. 3) Insert the screw and hand tighten. If the hole is already stripped, you would not need to make the hole bigger. This should help with your table legs and make them more stable.
This was the problem I had (the original hole had worn and was larger than the screw), and I had excellent results.
Based on my experience I say yes - this plus some gorilla glue - I would do this FIRST - see how it does - the product is not expensive - if it works I would remove screw and then add the glue.