What Is a Tapered Drill Bit? - InfoBloom
2020-3-28 · Run your tap into the hole to the depth of the threads on the tap. Use a 1/8 fitting as a thread gauge to insure you have enough threads. One may also ask, how do you drill a 1/4 NPT tap? National Pipe Thread Taper (NPT) is a U.S. standard for tapered threads used on threaded pipes and fittings.
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