Solid carbide mills are crest-cutting. Unified are for internal threads only. This listing is for each. Technical Specification Item Thread Mill Type Straight, Internal Size 3/4 Thread Size 3/4-10 Pitch 10 TPI Cutting Dia. 0.450 End Mill Material Carbide Flutes 4 Length of Cut 1.1400 Overall Length 3-1/2 Finish Polished Shank Dia. 1/2 Thread Type UN Nomenclature TM Application All Types of Metals, Composites and Tough-to-Machine Materials Cutter Dia. - Machining 0.4500 Drilling Tool Configuration Individual List Number TM Material - Machining Carbide Material Applications Composites, Hardened Materials, All Metals Measurement System Decimal Inch Number of Flutes 4 Material Solid Carbide