What size drills are we going to use to drill the holes in the M7 and with the larger twist drills?
M thread, the twist drill is used to represent theIf the hole drill with M7 drill bit is 6.5, you can use M7 taps.
The common thread M7 second series, not commonly used, the coarse thread pitch according to the national standard of 1mm, therefore, the bottom of the thread holes at the 6mm, actually should be: the bottom hole diameter of =7-1.06p, where p is the pitch, calculated 5.94mm, underport with 6mm drill bit, not too bad. After drilling, tap with M7 tap.
