How big a drill bit does the M6 screw hole need?
The international standard drills, 2 kinds of classification, is a national standard, such as Phi 7.6 Phi 7.2 Phi Phi 6.4 is a 6 inch according to distinguish, the common British 3/8, which is converted into a 1 inch diameter is =25.4MM 3/8*25.4= converted into China in millimeters in diameter.
M6 drilling, according to 0.85*6---0.9*6, this is a bit to see what interval selection, but also the rest of the material, and to what degree of precision, such as the country with the more stringent requirements you should check the mechanical manual hole base shaft tolerances, and the material is also related to comparison large, such as electric drill is to use wood to choose a smaller bit.
