上海周凯紧固件有限公司专业从事紧固件产品的销售，采购和生产，并给客户提供物流服务。
主要产品标准为DIN， ISO， GB，包括各类螺丝，螺栓，螺母，垫圈，铆钉及销钉等。公司位于上海嘉定南翔，地理位置及交通条件优越，可给位于上海及长江三角洲地区的客户提供快捷便利的服务。
公司与众多紧固件制造厂家建立了业务伙伴关系，成为其销售及代理点。公司按照标准对产品实行严格的质量控制和检验，并向客户提供及时完善的售后服务。
Introduction
Shanghai Zhoukai Fasteners Co., Ltd specializes in fasteners trading, purchasing and production, provides logistics services to customers. The products standards are according to DIN, ISO and GB, including screws, bolts, nuts, washers, rivets and pins. Our company is located in Jiading District of Shanghai, with convenience of transportation, providing in-time services to the customers in Shanghai and/or Yangtze delta region. We have close relationships or partner-ships with a number of fasteners manufacturers. We have quality control and product inspection processes to fasteners, and provide after-sales service all of our customers.