General description Dormer E500 straight flute taps are designed for versatility, allowing for tapping through or blind holes in various materials. They are the only type of taps that can be operated by hand, but can also be used in machines if necessary. When tapping blind holes, it is recommended to use straight flute taps in sets, which include a taper (first tap), intermediate (second tap), and bottoming (third or plug tap). Technical specifications Size: 10.0mm x 1.5 Tolerance: Class 2 for 6H Fit Material: HSS (High Speed Steel) Surface treatment: Bright Chamfer Numbers: 1, 2, and 3; Serial Numbers: 4 and 5 Flute Geometry: Straight Flutes ISO529