Zhengyuan Standard Parts Co., Ltd. is a company located in Zhoushan, China. Established in 1952, it started as a handicraft producers' cooperative and has now become an incorporated company with fixed assets worth RMB 12 million. The company operates in a 20,000 SQM area and has an annual production capacity of 5,000 tons. They are authorized to engage in import and export activities.

Situated in Shenjiamen Port, the largest fishing port in China, Zhengyuan benefits from convenient transportation and picturesque surroundings. They specialize in manufacturing a wide range of hex nuts, including M3M100, 1/23 hot upset hex nuts, in various standards such as GB, DIN, ANSI, JIS, BS, and SH. They also produce high-strength nuts, stainless steel nuts, and various nonstandard deformed parts and lock nuts.

Zhengyuan utilizes materials such as stainless steel 304 and 316, alloy steel 42CrMo, 35CrMo, and 40Cr, as well as carbon steel 45#, 35#, and 25# in their products. These nuts find applications in industries like bridge construction, petroleum, chemicals, and architecture. The company's products are highly regarded in China and are exported to.