Milwaukee 6-32 NC Straight Flute Plug Tap is precision engineered to create or repair clean and accurate internal threads with ease. This plug tap features long-lasting laser-etched sizing for clear markings and is coated with protective Black Oxide to resist corrosion. Its square shank fits all standard tap handles or wrenches and is designed for through-hole threading. Built for durability, it is i 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: 49-57-5115