CNC Machining Parts, Metal Stamping, Casting Parts manufacturer / supplier in China, offering DIN931 M6 Bouten Tuerca Y Perno Stainless Steel Boulon Hexagon Hex Bolts, Stainless Steel Hexagon Socket Set Screws Allen Grub Screws with Cup Point, DIN 980m All Metal Insert Prevailing Torque Type Hexagon Self Lock Nuts and so on.