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These helical-flute thread mills have a bright finish that provides a smooth, polished surface. They are suitable for general purpose applications at slower speed in nonferrous materials. The thread mills are made from carbide, which offers excellent wear resistance, heat resistance, and hardness. Helical-flute thread mills have spiral flutes that distribute the chip load as the thread mill removes material to cut threads into an existing hole or onto the external surface of a part. They provide a smoother cut than straight-flute or single-profile thread mills and are used to create threads on tough or thin-walled materials. Helical-flute thread mills can create internal threads of the same pitch in a range of hole diameters, eliminating the need to change tools when threading multiple holes of different sizes. Thread mills are only usable in CNC machines that have helical interpolation capability. This listing is for each. Technical Specification Item Thread Mill Flute Type Helical Material - Machining Carbide Finish - Machining Bright (Uncoated) Thread Standard Metric Thread Size M8x1 Cutter Dia. 0.2350 in Length of Cut 0.6850 in Overall Length 2-1/2 in Shank Dia. 1/4 in Shank Length 1.8150 in Number of Flutes 3 Pitch 1.00mm List Number TM Nomenclature TM Measurement System Metric Material Applications Composite, Steel Primary Material Application All Materials Series SPTM