China Factory Directly Supply ISO 10642/DIN 7991/UNI 5933 Hex/Hexagon Socket Flat Countersunk Head Screw with Grade 8.8/10.9 Zinc Plated, Find details about China Hex Socket Flat Countersunk Head Screw, ISO 10642/DIN 7991/Uni 5933 from Factory Directly Supply ISO 10642/DIN 7991/UNI 5933 Hex/Hexagon Socket Flat Countersunk Head Screw with Grade 8.8/10.9 Zinc Plated