Kennametal - #8-32 UNC H3 Thread Limit Bottoming Thread Forming Tap - Vanadium High Speed Steel, TiCN Finish, 2.13" OAL, 3/8" Thread Length, Right Hand Thread, Series 5502TC

Bottoming chamfers are used for threading blind holes to the bottom. They have 1 to 2 threads.

Titanium carbonitride (TiCN) is harder and more wear resistant than TiN. It is used on stainless steels, cast iron and aluminum alloys.

Vanadium High Speed Steel (HSSE) is made of high speed steel, carbon, vanadium carbide and other alloys to increase abrasive wear resistance and toughness. It is commonly used in general applications on stainless steels and high silicon aluminums.