Industrial F-8478 Plug Hand Tap 4 Flute HSG H3

Regal Cutting Tools’ 1/2-13 UNC H3 plug hand tap, 4-flute, high-speed steel with a bright finish, is an eight-inch, right-hand, plug chamfer tap designed to cut internal threads in holes sized for 1/2"-13 UNC. It features a four-flute geometry for efficient chip removal and stable starting in metal workpieces, a plug chamfer to ease thread initiation, and a straight, 0.507" shank for compatibility with standard hand-tap holders. The tool carries an H3 thread limit for a 3B class of fit, helping ensure consistent thread engagement with mating parts. Constructed from high-speed steel, this tap is built for durability in tapping operations where extended reach is required, such as tapping hub pockets or pulley components that accommodate set screws or caps. Key dimensions include an overall length of 8 in and a thread length of 1-21/32 in, making it suitable for penetrating deeper holes while preserving thread integrity. Designed for right-handed use with standard cutting fluids, this 1/2"-13 UNC plug hand tap provides a precise, dependable threading solution for industrial applications like pulleys, hubs, and related assemblies where robust, clean internal threads are essential.