Established in 1980, Haiyan Dazhong Nut Co., Ltd. is a specialized manufacturer of standard fasteners. Close to Hangzhou Bay Crossing-Sea Bridge and Shanghai, we are enjoying a great geographical location and convenient transportation. Covering an area of 38,000 square meters, we have over 150 sets of production equipment and inspection equipment. Our branch, Communication & Casting Steel, is mainly involved in the business of expansion bolts and expansion jackets. The annual sales amount has reached USD1,000,000. Our products have been exporting to the American and European markets for many years. As one of the leading manufacturers of standard fasteners, we can mainly supply hex nuts, expansion-bolts and expansion-jackets, spring nuts, full thread bars (triangle threads and trapezoid threads) and ground bolts (including common ground bolts, double-ended ground bolts, U mould ground bolts as per DIN and ANSI standards). We have passed the international quality management system of ISO9001, and can produce standard fasteners according to DIN, ANSI, BS, ISO, GB and non-standard fasteners. Meanwhile, we also deal with customization upon customers&＃039; drawings or samples. Adhering to the principle of "quality taking up markets, credit seeking further development", we are now looking forward to even greater cooperation with overseas customers based on mutual benefits. Please feel free to contact us for more details.