HSS Plug Tap
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Details
A plug tap is primarily used for creating internal threads, particularly in through-holes (holes that go completely through a workpiece) or when starting threads in blind holes (holes that don't go all the way through). It has a shorter, more defined taper at the front than a taper tap, making it suitable for both through-hole tapping and starting threads in blind holes.
Through-hole tapping:
Plug taps are a common choice for through-hole threading because they can fully cut threads through the material without the need for a separate starter tap.
Blind hole threading:
While not ideal for finishing threads in blind holes as well as a bottoming tap, plug taps are often used to start threads in blind holes, especially when there's enough depth to accommodate the tap's length.
Characteristics:
Plug taps have a 4-6 thread chamfer (tapered portion) on the front, providing a good cutting action and a more complete thread compared to a taper tap, but not as fully finished as a bottoming tap.