Milwaukee 3/8"-24 NF Straight Flute Plug Tap is expertly crafted to create or repair clean and precise internal threads. These plug taps are precision machined and feature long-lasting laser-etched sizing for clear and accurate markings. They are coated with a protective Black Oxide finish to resist corrosion and ensure durability. The square shank fits all standard tap handles or wrenches and is i for through-hole threading. Designed for use with common metals such as brass, aluminum, and mild steel, this tool performs when used with cutting fluid to extend its life and improve cutting efficiency. Model Number: 49-57-5151