CNC Machining Parts, Metal Stamping, Casting Parts manufacturer / supplier in China, offering DIN603 Fine Thread Round Head Bolt M20 M10 M4 Stainless Steel Flat Head Carriage Bolt, DIN6921 Color Zinc Carbon Steel Rainbow 10.9 Grade External Hexagon Flange Head Bolts Screw Hex Bolt, Hot Selling Anti Theft Twist off Break Away Security Shear Nuts and so on.