The Hertel Hand STI Tap features precision 7/8-14 UNF threading with H3 tolerance and 4 flutes for superior cutting performance. Designed with a plug chamfer, this high-speed steel tap delivers consistent, accurate threads across a variety of materials. With a generous 2-1/2" thread length and 5-1/8" overall length, this tap provides excellent reach for deeper threading applications. The bright finish ensures visibility during operation and helps resist corrosion. Manufactured by MSC Industrial under the trusted Hertel brand, this professional-grade tap (Part #007186AS) is engineered for durability and longevity in demanding threading operations. Ideal for creating precise internal threads for screw thread inserts in manufacturing, maintenance, and repair applications.