The Hertel Extension Tap is a precision threading tool designed for creating internal threads in hard-to-reach areas. This #6-32 UNC tap features 2 flutes with an H3 bright finish and is crafted from durable high speed steel. The spiral point design (also known as a gun tap) efficiently pushes chips forward, making it ideal for through holes. With a plug chamfer and 4" overall length, this tap provides excellent reach for deep threading applications. The 2B class of fit ensures standard tolerance threads suitable for most general-purpose applications. Manufactured by MSC Industrial under the trusted Hertel brand, this extension tap (Part #G837622) is a reliable choice for machinists and toolmakers who need consistent, accurate threading results in challenging locations.