Hex bolts, stud bolts grade 12.9 10.9 8.8 High stregnth Hex bolts, socket screws Gr8 8 10 9 12 9 Zinc plated China fasteners located in ningbo, high strength hex bolts 8.8 10.9 12.9 High tensile Hex bolts, socket screws DIN standard class 8 8 10 9 12 9 Black oxide All kinds of thread rod, stud bolts, carbon steel hex nut, DIN, ASTM standards hex socket cap bolts/screws DIN912 Gr10.9 All kinds of hardware,fasteners Video of our bolts being used in customer engineering projects Professional bolts factory in China DIn6914, EN14399