Westward 132210076 Straight Flute Tap A straight flute tap is a type of cutting tool used in threading applications. These taps have a bright finish that provides a smooth, polished surface. They are commonly used in applications where a straight, consistent thread is required and are typically used in materials like steel, aluminum, and brass. Thread Size / 3/8 inch-16 Thread Standard / UNC Tap Chamfer / Taper Tap Material / Carbon Steel Tap Finish / Bright (Uncoated) Thread Length / 1-1/4 inch Overall Length / 2-15/16 inch Thread Direction / Right Hand Number of Flutes / 4 Coolant Fed / Non-Coolant Through Drill Bit Size / 5/16 inch Measurement System / Fractional Inch Primary Material Application / All Materials Shank Dia / 3/8 inch Shank Type - Machining / Straight Square Size / 0.2860 inch Standards / ASME Tap Style / Straight Flute Threads per Inch / 16