That's right, we can't seem to find a local source for a 16.5mm drill bit or
.6496" in inches.

Anyone got any ideas. We have looked / called all your normal shops it seems.

i will see when i get home.. i have a lot of them i just need to find them.... what type of metal are you needing to drill?

-E

Stainless.

ok, i will see if i have some nicer drill bits in the storage...

-E

That would be great! It's the last piece of a really nice puzzle!

Does .006" really matter? You could use a 21/32nds drill bit, that is .6562"

J&L has them too, J&L.

if they would spill some more info out we might know if a size smaller or size bigger would be better off..

-E

Has to be 100% dead on. o2 bung. Mike says, it's gotta be perfect.

The main thing is after paying a large price for the tap we'd like it to last a long time as well.

Use the larger size if it is just for a tapped thru hole. It makes the tap go in easier too. 6 thou diameter won't make any difference, especially on threads that big. That is only 3 thou depth.

and it will still make a good seal.. especially if you use teflon paste..

Snap-On man can't hook ya up?

Yep, .006" is fine considering it is larger. Allan was just quoting me when I said exact. I always shoot for perfect, but if I can't what I need in a reasonable time, I can handle going with something that close since it is towards the plus side.