The Hertel Extension Tap is a precision threading tool designed for creating M16 x 2 metric coarse threads. Featuring 3 flutes and a D7 design, this high-quality tap is crafted from durable High Speed Steel with a spiral point (plug chamfer) configuration that efficiently channels chips forward—ideal for through holes. With a generous 6" overall length, this extension tap provides excellent reach for deep threading applications while maintaining stability. The 6H class of fit ensures standard metric thread tolerances for reliable, consistent results. Manufactured by MSC Industrial under the trusted Hertel brand (Part #R837687), this professional-grade tap delivers the performance and durability needed for industrial threading applications. The extended length design allows access to recessed areas that standard taps cannot reach, making it an essential tool for machinists working on complex projects.