Manufacturer Name: Maima Co., Ltd. [Features] Gas tap for hard working materials. Left spiral groove angle is 8°. [Uses] Coating Material: Alloy steel, medium, high carbon steel, stainless steel, cast steel. Specifications: Accuracy: JIS 2 Grade Nominal Size: 1/2 Thread Count: 14 Thread Length: 1.4 inches (35 mm) Total Length: 3.1 inches (80 mm) Shank Square Part: 0.6 inches (18 mm) Shank Diameter: 0.6 inches (14 mm) Bottom Hole Diameter: 0.7 inches (18.0 mm) Processing Thread: Tapered Screw: JIS Grade / High Speed Steel (H). SS-E/HSS)