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: 11/2 Thread Count: 11 Thread Length: 1.8 inches (45 mm) Total Length: 4.3 inches (110 mm) Shank Square Part: 1.1 inches (29 mm) Bottom Hole Diameter: 1.7 inches (44.0 mm) Processing Thread: Taper Screw: 3 Thread Count: 3 Thread Count: Oxidation Processing: Oxidation Processing: Spiral Left 8° ] / High Speed Steel (HSS-E/HSS)