Overview Reviews Product Description HSSE - for toughness and increased wear resistance TiAlN coated - increases wear resistance, improves chip flow and reduces chip welding 15° Degree helix Designed to produce a 2B class of fit Shorter thread length for better chip evacuation and reduced contact with workpiece ANSI shank / ISO length Suitable for use on abrasive materials such as cast iron Clarkson Osborn Catalog Product Videos Custom Field Size 5/16-18 NC Flute length 7/8" Overall length 2-23/32" Package quantity/sold as each 1 Product Reviews Write a Review Write a Review × Clarkson-Osborn 5/16-18 NC HSSE White Ring Spiral Flute Tap CT60405 Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *