Milwaukee 3/4"-16 NF Straight Flute Plug Tap is expertly crafted for creating or repairing clean, accurate internal threads. Precision machined, this plug tap features long-lasting laser-etched sizing for clear markings and is protected with a Black Oxide coating to resist corrosion. Its square shank fits all standard tap handles or wrenches and is designed specifically for through-hole threading. Built for durability, it cuts threads efficiently 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: 49-57-5178