Vermont Tap & Die - 3/8-24 UNF, 4 Flute, Bottoming, Plug & Taper, TiN Finish, High Speed Steel Tap Set - Right Hand Cut, 2-15/16" OAL, 1-1/4" Thread Length, 2/3B Class of Fit, Series TN3105

Bottoming chamfers have 1 to 2 threads. Plug chamfers have 3 to 5 threads. Taper chamfers have 7 to 10 threads and are typically used as a starter tap. They all can be used for threading blind holes.

High Speed Steel (HSS) provides good wear-resistance and can be used in general purpose applications for both ferrous and non-ferrous materials.

Titanium Nitride (TiN) is a multi-purpose coating which increases chip flow in softer materials. The heat and hardness resistance allows the tool to run at higher speeds than uncoated tools.