... thread flat head ribbed neck bolt with zince plated Xiamen Haixingcheng Metal Products Co., Ltd ... .We have experienced engineers and well-equipped testing equipment and strong technical force.Tell ... Steel,Bronze, Iron,Aluminum,Carbon steel,Alloy steel, silicon bronze,etc.Head/Tread stylesAccording ... 's requiresCoating/Surface treatmentZinc,Tin,Sn/Pb,Nickel,Chrome,Titanium, Cadmium, Dacromet,Heat dip zinc ...