Walter-Prototyp - M4x0.70 Metric 3 Flute 6HX Modified Bottoming Spiral Flute Tap - Powdered Metal, Bright Finish, 63mm OAL, Right Hand Flute, Right Hand Thread, Series 20416

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.

Powdered Metal (PM) is tougher and more cost effective than solid carbide. It is commonly used on highly abrasive materials including high silicon aluminums.

Bright provides a smooth, polished finish on the tool. It increases chip flow in softer materials such as aluminum, wood and plastic.

Slow Spiral Flutes with 8-20 degree angles are used for tough materials like high nickel alloys, titanium and some series of stainless steels.