TAP: M18.0 X 1.5 HSS-M2 INTER METRIC FINE (SPARK PLUG)

* All our taps are manufactured from quality HSS-M2 for durability and extended tool life * This is a Metric Fine Intermediate or Second Tap
* Taper or first tap has a long chamfer and trapeziform cutting edges and preformd about 60% of the cutting work
* The intermediate or second tap has a shorter chamfer and trapeziform cutting edgeswhich are deeper, and completes around 30% of the cutting work
* The 3rd or bottoming tap (finishing) has a short chamfer and cutting edgeswhich create the final sharp form of the thread groov