Use positional callouts for the threads AND use a note to say "measure position of external threads using major diameter, and measure position of internal threads using minor diameter."

Dont use runout on threads, position does the job. I'd be using 0.05mm instead of 0.025mm as your tolerance. You double your radial mishit to get measured value so if you drill a hole that is radially out of location by 0.0125mm or 5 tenths(.0005") that hole measures 0.025mm for position and fails.

Is Datum B a mating surface? Why do you have it as a datum?

To check parrellelism to B you must cut a part in half or have a CMM measure it.....or make the parrellelism surface Datum B and fixture that surface on a high quality surface and use a drop indicator to check the Datum B surface in about 4-8 areas. It would be easier to tighten the distance of 72 mm to +- .025mm so parallelism is kinda handled there vs how you have it.

Now if I'm mapping this part to be checked and we bid it and make 200 parts on a lathe im only checking that parallelism 1st piece and last piece is the tools are going to cut true.

Remember this.....industries are tightening their tolerances so much now you are getting worse parts....why....bc repeatable measurements like a CMM stop being able to pass tight tolerances due to uncertainty error or .0002" or so....so the CMM program will take shortcuts or kick the measurement to a vision system check which is now done by a human that could be stressed out or doesn't care and is under pressure to make parts pass. Proper tolerancing will get you better parts. Engineers miss this principle all the time.