[whiskyb]

I am in the process of painting my car. Tomorrow I will spray my first coats of epoxy primer. Before doing so I need to drill some hole for threaded inserts. They are 6mm thread but i do not know what size hole they take. I am not even sure if they are all the same but would like to drill and then epoxy for the best corrosion protection

Anybody have any idea on hole size.

Thanks