CNC Machining Parts, Metal Stamping, Casting Parts manufacturer / supplier in China, offering Hex Bolts with Slot or pH Recess, DIN7984 Astainless Steel Allen Bolt Hex Socket Screw with Low Head, Allen Bolt DIN912 Black Screw M14 Grade 8.8 10.9 12.9 High Strength Carbon Steel Hexagon Socket Machine Screw and so on.