What size drills and taps are required for drilling M10's internal threads?
Tap with M10*1 tap (not considered the accuracy of thread); if it is M10*0.75, use Phi 9.2 bit; tap with M10*0.75 tap (not considered the accuracy of the thread level).
M10*1.5 (not considering tap tap for precision thread); if M10*1.25, with Phi 8.7 bit; M10*1.25 (without considering precision tap tap thread); if it is M10*1, with 9 bit;
Internal thread drill M10 should choose the drill and tap should take into account the thread pitch. If you are a standard thread M10*1.5, thread holes should be used with 8.5 bit;