Shanghai Zinsn Industrial Co.,Ltd. is a professional China carbon steel fasteners manufacturers and stainless steel fasteners suppliers. We regard quality as the life of the company. Our company persists good quality as the first policy and has established a set of quality control and inspection system according to the international standard. We have carried out ISO9001 Quality Guarantee System in every course of production, transportation and selling. In addition, we have advanced inspecting machines and methods to meet your requirements and safeguard your...