... steel, silicon bronze,etc.Head/Tread styles According client's requiresCoating/Surface treatment Zinc,Tin,Sn/Pb,Nickel,Chrome, ... , ISO9001:2008, ISO14001:2004Carton size 30X20X20cm or according client’s requires About us: Xiamen Haixingcheng Metal Products Co., Ltd. ... and dedicated people and enduring commitment to excellence, our company makes a good performance in screw industry and develops well with ...