Straight flute taps are the only type of taps that can be used by hand but they may also be used in a machine if required. They can be used for either through or blind holes. When tapping blind holes straight flute taps should be used in sets. The three taps which form a set are known by more than one name. 1. Taper or First tap 2. Second or Intermediate tap 3. Bottoming third or plug tap. Metric coarse straight flute taps. Tolerance: Class 2 for 6H Fit Surface treatment: Bright.
Material: HSS High Speed Steel Chamfer No: 12 & 3 Serail no 4 & 5. Flute Geometry: Straight Flutes. ISO529 Size 6.0 x 1.0 set of 3.