Industrial GH3-11 1/2-20 NF three-flute spiral-point plug tap for cutting internal threads in drilled holes. The 3-flute spiral-point design pushes chips ahead of the cutting edge, while the GH3-11 designation identifies a plug tap with a 3-flute geometry and a thread-limit class of H3 for controlled depth and thread form. It is intended for applications requiring 1/2-20 NF threads, enabling precise internal threading in general machining and assembly tasks.
