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 #8 Thread Size #8-32 Pitch 32 TPI Cutting Dia. 0.125 End Mill Material Carbide Flutes 3 Length of Cut 0.3550 Overall Length 2-1/2 Finish Polished Shank Dia. 1/4 Thread Type UN Nomenclature TM Application All Types of Metals, Composites and Tough-to-Machine Materials Cutter Dia. - Machining 1/8 Drilling Tool Configuration Individual List Number TM Material - Machining Carbide Material Applications Metal, Composites, Tough-to-Machine Materials Measurement System Fractional Inch Number of Flutes 3 Material Solid Carbide