CNC Machining Parts, Metal Stamping, Casting Parts manufacturer / supplier in China, offering Custom DIN931 Carbon Steel Stainless Steel Hexagon Head Bolt Galvanized Half Thread Hex Bolt, DIN933 Grade 4.6/8.8/10.9/12.9 Fully Thread Hexagon Head Bolt Carbon Steel Hex Fasteners Bolts, China Metric Bolt DIN933 DIN931 M2 M4 M6 M8 High Strength Full Thread Hex Bolt and so on.