Thread: Drilling and Tapping...

I could use a little help and maybe there are some metal-heads on the forums.

I need to drill out a hole, enlarge it by about 2mm and, since it was originally threaded, replace the threads.

The size someone else has used for the same project is #2 BA (4mm i think), which is a British size. Im having trouble finding American equivalents.

And worse yet, where to even find such taps to purchase.

Any help would be greatly appreciated.