M2 High Speed Steel Precision ground thread ANSI B94.9 Parallel shank with square Straight Flute Right hand threading Full form with Taper, Second, or Bottoming lead for American Taper Pipe threads Usually supplied in bright ground finish Tap basic dimensions shown in mm May be used by hand or in machines to produce accurate threads in most materials
Sets of Taps A set of three hand taps in this series will consist of taps with taper, second, and bottoming leads. They are full form, and so differ only in the length of the chamfered lead provided. In the case of BSPT and NPT taps, where the thread profile is itself tapered, it is quite normal to use only the bottoming tap, although in this case the long length of engagement means a larger power requirement.
