Tap is M14-H2, drill with big bit
In practice, the thread material is different, the bottom diameter is different: Iron and steel parts are different, coarse and fine teeth are not the same, the habit of hand tapping and drilling tapping are not the same. Standard pitch M14 thread is 2, so the threaded hole diameter of 12, to select 12.20 pieces of steel, there are two kinds of specifications of fine teeth: a pitch of 1.50 or 1, the corresponding threaded hole diameter is 12.60 and 13.10.
The tap is M14-H2 and can be punched with a drill with a diameter of 12.The threaded hole diameter can be determined by the formula:The nominal diameter of the screw - thread pitch = threaded hole diameter
