Iscar - M8x1.25 Metric Coarse 3 Flute 6H Modified Bottoming Spiral Flute Tap - Cobalt, Oxide Finish, 90mm OAL, Right Hand Flute, Right Hand Thread, Series TPS M

Modified bottoming chamfers are similar to bottoming chamfers, but they are longer and have more teeth. They are used for threading blind holes and have 2 to 2-1/2 threads.

Cobalt is harder than high speed steel and provides better wear resistance. It is commonly used on high tensile alloys.

Oxide, also known as black oxide or steam oxide, is a surface treatment that prevents chip building, galling and welding on the workpiece. It is commonly used on low carbons, stainless steel and ferrous metals.

Spiral flutes are constructed of a high flute angle to remove chips more easily.