Thanks for the reply.
I was thinking more like corrosion,not overtightening.I guess I should have clarified that.
However those door latch ones should be pretty tight,but I agree the fender ones not so much.
In the past,I have used something similar we called a "nut-sert" basically the same thing,except the kit came with a tool that was like alot like a pop-rivet gun to set the nut/insert.
They work really good.I used them instead of self-tappers to install bug sheilds on trucks so you could take it off to clean under it.(that was back in my "truck accessory days"..lol
I may pick some up,probably black and silver.but I will wait until you have a good amount available.