4-40 UNC Yellow Ring HSSE-V3 Spiral Flute Taps
HSSE-V3% Vanadium - Superior performance in hardened tool steels such as 4140, 4340, H13, D2.- Up to 35 HHRC Designed for high-speed tapping applications. Features a unique free-cutting design with a special tempering and geometry which contributes to extra tool life.