DORMER - M4x0.70 Metric Coarse 3 Flute 6H Modified Bottoming Spiral Flute Tap - Powdered Metal, Bright Finish, 2-1/8" OAL, Right Hand Flute, Right Hand Thread, Series E007

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.

Fast Spiral Flutes with 40-53 degree angles are suitable for ductile materials like aluminum and copper; medium to high carbon steels and free machining stainless steels.