Any machinist/toolmakers/cnc operators with 4 or 8g direct inputs

[corypi]

Hey I have a project I'm working on and I was wondering if any one can get me a measurement in thou of a direct 4 gauge or 8g input hole I don't have access to my amps yet. Or even if u have a set of drill. It's can u tell me what size fits best

i looked it up online and got .200 as standard but then I remembered that audio wire is oversized

thanks in advance