BBI® hex bolt, partially threaded, measurement system: metric, m10x1.5 thread, 70 mm L under head, 8.80 grade, medium carbon steel, zinc blue CR+3, UNC thread, 6.58 mm H head, hex head, 800 n/sq-mm tensile strength, 10 mm shank, 22 to 32 HRC hardness. BBI® 815094 Partially Threaded Hex Bolt, M10x1.5, 70 mm L Under Head, 8.80 Grade, Medium Carbon Steel, Zinc Blue CR+3