Hand tapping into blind and through holes demands accurate, well-formed threads, and the Draper 83797 Coarse Hand Taps set is manufactured from high carbon steel with accurately cut coarse threads to meet that requirement. The 4mm set features a thread pitch of 1.25mm and is supplied as one of each tap type — taper and plug (bottoming) — giving the user the correct sequence for starting and finishing a tapped hole. The taper tap is used first to guide the thread-cutting process and gradually introduce the thread form into the workpiece. The plug tap also known as a bottoming tap follows to cut threads closer to the base of a blind hole completing the full thread depth. Used together in the correct order these taps allow accurate metric coarse threads to be cut by hand in a range of materials. The taps are presented on a display card making them straightforward to identify store and return to after use. With both tap types included in a single pack this set provides a practical solution for workshop hand tapping at the 4mm coarse metric specification.
Manufactured from high carbon steel with accurately cut threads. Packed one of each, taper and plug, (bottoming) on display card.
Product Key Feature:
High carbon steel with accurately cut coarse threads
Thread pitch 1.25mm
One of each, taper and plug, (bottoming)
Contents:
1 x Coarse Hand Taps Taper and Plug, 4mm
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