CNC Machining Parts, Metal Stamping, Casting Parts manufacturer / supplier in China, offering DIN931 DIN933 Zinc Plated Stainless Carbon Steel Hexagonal Head Bolts, ASME B18.2.1 Bolts Stainless Carbon Steel Grade 2 5 8 Black Oxide Hex Bolts, DIN 982 Grade 4 8 Nylon Insert Lock Nuts Carbon Steel Hex Lock Nut and so on.