Haiyan Longcheng Standard Parts Co., Ltd. is located in the beautiful and rich Hangjiahu Plain in eastern China. It is located in the middle section of Shanghai-Hangzhou Expressway and is frequently located in Chapu Port. It has superior geographical position and convenient transportation. The company's predecessor name is Haiyan Shuangjian Standard Parts Factory. Now it is renamed Haiyan Longcheng Standard Parts Co., Ltd. It has a history of more than ten years. It specializes in manufacturing and selling all kinds of din571 zinc hexagon coach screwand has the right of self-export. At present, there are more than 50 employees, more than 10 professional and technological research and development, the company covers an area of 6 mu, has all kinds of advanced screw manufacturing machinery and equipment, and adopts advanced cold heading technology of high-quality steel.