Nitro Spiral Flute taps are produced with a reduced neck to allow for longer reach, improved coolant flow, and easier chip evacuation. They can be used for production threading in both conventional or CNC equipment, in a wide range of material groups, including difficult to machine materials such as High Tensile Strength Steels and Stainless Steel. Black Oxide surface treatment provides improved lubricity and helps prevent the formation of built up edge. Spiral Flute taps are designed for producing blind holes in a work piece. For best results and longest tool life, always use with cutting fluid.