Hi Dave,
Just checked my HS175 crank, which is on it's way back into the engine, and the thread pitch is M14 x 1.25mm Left Hand.
Metric threads are easy to check with a caliper or even a rule for the larger sizes.
The pitch is simply the measured distance between the adjacent peaks or troughs of the thread.
Hope your crank has low run-out after the rebuild!
Best Regards,
Mike Munday,
Australia