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YG-1 BI series super HSS spiral flute tap for steel and stainless steels uptp 35HRc. High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance. Hardslick coated. Round shanks allow use with a wide variety of toolholding systems. When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging. 0.472-inches thread length. Applications: Good for low carbon/free machining carbon steel, pure aluminum/aluminum alloys, pure and alloyed copper, free machining brass/alloyed brass, zine, magnesium. Excellent for medium to high carbon steel, free machining stainless steel.