How to deal with stripped out holes on Firewall

65 Dartman said
I would use the appropriate size nut cert to repair the stripped out hole. These are perfect for anything you need to fasten to sheet metal such as your little firewall components, external mirrors, etc.

toolmanmike said
Or check out "nutsert" on the net. You know, your local tool rental place may have a kit to rent. They are a permanent fix.

So it's a nutsert! I was kind of close with "nut cert".