Manufacturer Name: Maima, Co., Ltd. [Features] Standard pipe tap and is used when the screw part is not sufficient. Uses: Medium and high carbon steel, cast steel, cast iron, ductile cast iron, aluminum alloy casting. Specifications: Accuracy: JIS2 Grade Nominal Size: 1/4 Thread Count: 19 Thread Length: 0.7 inches (19.5 mm) Total Length: 2.4 inches (62 mm) Shank Square Part: 0.4 inches (9 mm) Bottom Hole Diameter: 0.4 inches (11.0 mm) Processing Threads: Tack Grade: JIS Grade [Material/Finish] / High Speed Steel (HS S-E / HSS )