Thread Cutting Part Length (THL). Straight Flute hand taps are used for hand tapping and machine tapping in through holes or blind holes in a wide variety of materials. This item is in the category "Business & Industrial\CNC, Metalworking & Manufacturing\Metalworking Supplies\Taps\Hand Taps". The seller is "ztsupply" and is located in this country: US. This item can be shipped to United States.