... carbon steel,alloy steel 2 Standard:DIN,GB,ISO 3.Diameter: 2.5mm-4.5mm 4.Finished: Zinc coated Quick DetailsPlace of Origin ... : DIN, GB, ISO, ANSI, ASME, JIB etc.Material: Carbon Steel, Stainless steel, Aluminium, Brass. Coating: Plain, zinc plated, galvanized, nickel plated ... type, and are widely used. These are made of high-quality carbon steel and are zinc-plated to provide strength and corrosion ...