Guhring - 9/16-12 UNC 3 Flute 2B Modified Bottoming Spiral Flute Tap - Cobalt, Bright Finish, 110mm OAL, Right Hand Flute, Right Hand Thread, H5/H6, Series 881

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.

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.