... :ISO14001 ISO9001 SGS Specifications Half thread flat head ribbed neck bolt with zince plated Xiamen Haixingcheng Metal Products Co., Ltd. ... ,Aluminum,Carbon steel,Alloy steel, silicon bronze,etc.Head/Tread stylesAccording client's requiresCoating/Surface treatmentZinc,Tin,Sn ... /Pb,Nickel,Chrome,Titanium, Cadmium, Dacromet,Heat dip zinc, Chromate , Electro Painting etc.Certificate SGS, ISO9001:2008, ...