... :ISO14001:2004 ISO9001:2001 SGS Specifications Truss head hex socket machine screw Xiamen Haixingcheng Metal Products Co., Ltd. is ... from Xiamen,China.We have experienced engineers and well-equipped testing equipment and strong technical force.Tell us what ... 8~M12MaterialStainless, Steel,Brass, Steel,Bronze, Iron,Aluminum,Carbon steel,Alloy steel, silicon bronze,etc.Head/Tread stylesAccording client's ...