Originally Posted by
rickseeman
I hope we never have an engine problem. The Merlin is already unbelievably complex compared to the auto engines I'm used to without having to think about threads.
BSW/BSF/BSP and BA taps and dies are readily available, so the amount of actual screw-cutting you need should be small, going on for zero and it should not be much of a problem for you, as US and UK use the same inch (unlike Germany and France!).
Having written that I shall add that I hope you don't get involved with the really big special threads such as that on the front of the propellor shaft.