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: JIS2 Grade Nominal Size: 3/8 Thread Count: 19 Thread Length: 1.1 inches (28 mm) Total Length: 2.6 inches (65 mm) Shank Square Part: 0.4 inches (14 mm) Shank Diameter: 0.4 inches (11 mm) Bottom Hole Diameter: 0.6 inches (14.5 mm) Processing: Tapered Screw: Tack Grade: JIS Grade / High Speed Steel (H). SS-E/HSS)