Most of the screws in the body of my roadster were rusted out and would not screw out. When pulled out, their holes were well oversize. I needed to save the bent backboard, and came up with the following fix for the oversize screw holes.
Using a spade bit, I drilled a land over the flogged out countersink.
Then I drilled a 1/4" hole through the pillar and put a new countersink on the inside.
A 1/4" countersunk metal thread (excuse the Phillips drive, it won't be seen) was screwed in.
In the original outside countersink, the metalthread engages a T nut, altogether a neat and much stronger solution.
Knowing how much we English speakers diverge, you probably have a different name for a T nut.
Allan from down under.
nope we call them T nuts also
if this is what you are referring to
I thought you were going to tell us that you were the "T nut" and you bought another T to get your "fix"!
I will not say what I was thinking.