Dormer E500 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.

Extremely versatile, can tap through or blind holes in most materials. 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: 1,2 and 3, Serial no 4 and 5
Flute Geometry: Straight Flutes

ISO529

Size 4.0mm x 0.7 taper