The Hertel Extension Tap is a precision threading tool designed for creating accurate 1/2-20 UNF threads. Featuring 3 flutes and an H3 design, this high-speed steel tap delivers consistent performance in demanding applications. The spiral point (plug chamfer) design efficiently pushes chips forward, making it ideal for through-hole tapping operations. With a generous 6" overall length, this extension tap provides excellent reach for deep-hole threading tasks. The bright/uncoated finish offers good visibility during operation, while the 3B class of fit ensures threads meet industry standards for precision and tolerance. Manufactured by MSC Industrial under the trusted Hertel brand, this professional-grade tap (Part #R837655) is built for durability and reliable performance in machine shops, maintenance facilities, and manufacturing environments.