Milwaukee 1/4"-18 NPT Straight Flute Taper Tap is precision engineered to create or repair clean and accurate internal threads with ease. This taper tap features long-lasting laser-etched sizing for clear markings and is coated with a protective Black Oxide finish to resist corrosion. Its square shank fits all standard tap handles or tap wrenches, while the taper design ensures a gradual start when cutting threads. Built for durability, this tap is i for threading in common metals such as brass, aluminum, and mild steel. For optimal performance, it is to use cutting fluid with the taper taps. Model Number: 49-57-5191