Quote Originally Posted by rovercoupe View Post
Hopefully here is a pic of the port in question,
....well if you want to go with the advice of a materials eng ...you could go with exactly the same material.
If its not a bearing, which must always be a different, or harder material, going with same materials brings with it the same rates of exspansion/contraction...regardless of what conditions its being subjected to....thus if its a drive fit ....it will stay a drive fit...
So i would drive in a turned lump of solid brass and then simply drill the hole to the size you want.
It might even look like it was meant if you polished it front and back face....as if made from one piece.
Alternatively ill machine you one from solid one piece if wanted.