1/2" - 14 TPI National Pipe (Tapered) Thread Form. Here's an example (and a better way to see) the thread milling process in action. Inside Diameter, Outside Diameter, right hand or left hand can be done with the same tool, assuming the same thread form is in play. See www.Advent-Threadmill.com for more details.
very professional
mynameistooey 1 year ago