Milwaukee 1/2"-20 NF Straight Flute Plug Tap is expertly crafted to create or repair clean, precise internal threads with ease. This plug tap is precision machined to ensure accuracy and features long-lasting laser-etched sizing for clear, easy-to-read markings. Its protective Black Oxide coating enhances corrosion resistance, making it durable for frequent use. The square shank design fits all standard tap handles or tap wrenches and is i for through-hole threading. Engineered for toughness, this tap is for cutting threads in common metals such as brass, aluminum, and mild steel. For optimal performance, it is to use this plug tap with cutting fluid. Model Number: 49-57-5162