Carmex Thread Mills Solid Carbide - Fast Type - For Hard Materials - Metric - M2.5 x 0.45 - MT3Carmex FSH Thread Mills in MT3 are precision solid carbide tools built for high hardness threading. Designed for hard materials and superalloys, they deliver dependable M2. 5 x 0. 45 threads with a fast type geometry that balances aggressive cutting with control. Thread milling family: FSH series with a high flute count for efficient chip evacuation in tough materials. Material: Solid carbide construction for exceptional rigidity and wear resistance