'Thread Mill, Helical, Internal or External, 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 NPT, Nomenclature TM, For Use With -, Application All Types of Metals, Composites and Tough-to-Machine Materials'