SD (SHANGHAI DONGLUO PRECISE MACHINE INDUSTRIAL CO., LTD) is a reputable company that manufactures and distributes threaded fasteners and precise machined parts for various industries. They operate a modern production plant equipped with advanced machining equipment and offer a wide range of manufacturing capabilities, including hot heading, thread rolling, CNC turning and milling, and various types of grinding.

All products are made from high-quality materials that meet industry standards, and SD is also able to accommodate special customer requests. They have established long-term cooperative relationships with customers from around the world and aim to develop together with them in a win-win situation.