The Hertel Extension Tap is a precision threading tool designed for professional machining applications. This 1-8 UNC tap features 4 flutes with an H3 tolerance and bright uncoated finish for optimal performance. Crafted from high-quality high speed steel, this standard hand tap with plug chamfer provides excellent durability and cutting efficiency when creating internal threads. The extended 6" overall length allows for reaching deep holes and recessed areas that standard taps cannot access. Perfect for maintenance professionals, machinists, and industrial applications where precise threading is required. The extension design provides additional reach while maintaining the cutting performance needed for consistent, accurate threads. This Hertel tap (Part #R867172) is manufactured by MSC Industrial to deliver reliable performance in demanding threading operations.