Product_description: ["'Thread Mill, Straight Flute, Internal Or External Threads, 1/8, Thread Size 1/8 In.-27, Pitch 27 TPI, End Mill Material Carbide, Flutes 4, Length of Cut 0.7580 In., Overall Length 3-1/2 In., Polished, Shank Dia. 3/8 In., Thread Type NPTF, Nomenclature TM, For Use With -, Application All Types of Metals, Composites and Tough-to-Machine Materials'", 'These straight-flute thread mills have a bright finish that provides a smooth, polished surface. They are suitable for general purpose applications at slower speeds in nonferrous materials. Carbide thread mills offer excellent wear resistance, heat resistance, and hardness. Straight-flute thread mills are suitable for general purpose thread-milling applications. They provide good strength but require a rigid machine setup. Straight-flute thread mills create 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 Straight Material - Machining Carbide Finish - Machining Bright (Uncoated) Thread Standard NPTF Thread Size 1/8-27 Cutter Dia. 0.2800 in Length of Cut 0.7580 in Overall Length 3-1/2 in Shank Dia. 3/8 in Shank Length 2.7420 in Number of Flutes 4 Pitch 27 TPI List Number TM Nomenclature TM Measurement System Fractional Inch Material Applications Composite, Steel Primary Material Application All Materials Series SPTM'] (Page 1)