... class high tensile fasteners by forging. Buyer's Inquiry:Customer can inquiry us by Sizes, OEM Numbers, Drawings and samples. ... advanced payment or L/C according to quantity and items.We can supply many kinds o f surface treatment, Include dacromet and ... trivalent zinc plating, which with RoHS compliant. At the meantime, we offer surface treatment in black oxide, phosphate , eletrophoresis and so ...