Hex Lag Screw, Machine Screw, Hex Socket Cap Screw manufacturer / supplier in China, offering DIN931/ISO4014 Hex Bolt Screw M45 Grade4.8/8.8/10.9/12.9 White/Black/Yellow/HDG Zinc Plated, DIN931/ISO4014 Hex Bolt M110 Grade10.9/12.9 White/Black/Yellow/HDG Zinc Plated, DIN931/ISO4014 Hex Bolt M110 Grade4.8/8.8 White/Black/Yellow/HDG Zinc Plated and so on.