The Hertel Straight Flute Tap is a precision threading tool designed for creating internal threads with a 1/2-20 UNF (Unified National Fine) thread specification. Featuring 4 straight flutes for efficient chip evacuation and a bottoming chamfer that allows threading nearly to the bottom of blind holes. This tap is manufactured from high-quality high-speed steel with a bright/uncoated finish for durability and performance across various materials. With a 3B class of fit, it provides standard threading tolerance for general-purpose applications. The tap measures 3-3/8" in overall length and is designed for right-hand threading operations. Ideal for maintenance professionals, machinists, and manufacturing applications where precise UNF threading is required. This hand tap combines reliability and precision for consistent threading results in both production and repair environments.