The Hertel Extension Pipe Tap is a precision threading tool designed for creating 1/16-27 NPT threads with exceptional accuracy. Featuring 4 flutes and a plug chamfer design, this high-speed steel tap delivers consistent performance for professional applications. With a bright finish that resists corrosion and a standard profile, this tap maintains its cutting edge through multiple operations. The 4-inch overall length provides extended reach for accessing deeper holes and recessed areas. Manufactured by MSC Industrial under the trusted Hertel brand, this extension pipe tap (Part #091396AS) is engineered for durability and precision in demanding industrial environments. Perfect for plumbing, automotive, and manufacturing applications where precise NPT threads are required for proper sealing and connection integrity.