Standard ASTM Grade A490/A490M Finish Carbon Steel/Steel: Zinc (Yellow, White, Blue, Black), Hot Dip Galvanized (HDG), Black, Geomet, Dacromet , Anodization, Nickel plated, Zinc-Nickel plated, Teflon(PTFE), etc. Material Alloy steel Size M6-M80,1/4-3or as your requirement.
