Nantong Zhuoyue Accurate Fitting Co.,LTD. is located in Hai'an City, Jiangsu Province, on the coast of the Yellow Sea. It is located at the intersection of Xinchang Railway, Ningqi Railway, 204 National Highway and 328 National Highway. It is adjacent to Shanghai. The railway, national highway and canal meet here, and the transportation is convenient.

Founded in 2002, Nantong Zhuoyue Accurate Fitting Co.,LTD. is a spring manufacturer integrating R&D, production, sales and service, and one of the few domestic service providers that can provide spring solutions for agricultural machinery. The company is mainly engaged in the production of medium springs, spring fragments, metal stampings and various metal wire forming products with complex shapes, covering agricultural machinery, elevator accessories, engineering machinery, automobiles, railway locomotives, housing bridges, electric power, precision instruments, sports equipment, electronics and electrical appliances and other industries. Cao Spring is the only registered trademark of the company.

The company has nearly 100 sets of fully automatic CNC spring coiling machines, torsion spring machines, spring compression machines, spring grinding machines, heat treatment equipment, agricultural machinery spring tooth fatigue testing machines, force measuring machines and other equipment, and has independently developed full-automatic spring surface treatment lines, filling many gaps in China. At present, it can produce springs of various sizes ranging from 0.15 mm to 70 mm in diameter, with an average daily output of up to 40 million pieces. The company passed the ISO9001: 2000 international quality management system certification in 2007. Scientific management concept and standardized product quality management system have created the leading technology and reliable performance of Cao Spring's products. Spring of agricultural machinery is the main product of the company, including spring teeth of baler, spring teeth of full feed harvester, spring teeth of rake, spring teeth of sun turner, spring teeth of rake film machine, and tension spring and pressure spring of various agricultural machinery.

The product has won the annual award of China's agricultural machinery industry (parts award), the gold award of China's agricultural machinery parts product selection, and the innovation award for many times; "Jinggeng Cup" agricultural machinery industry awards for innovative products. Cao Spring is favored by host manufacturers and world enterprises, and has become the first choice of supporting facilities such as ThyssenKrupp, Lovol Arbos, John Deer, New Holland, Klass, Maschio, Jiangsu Wode, Xingguang Agricultural Machinery, Inner Mongolia Huade, Shidar, Weimeng, etc.

Seiko Cao spring, brilliant new quality. Standing at a new height, the striving Nantong outstanding people will seize the opportunity to take off, continue to stand high in the tide of science and technology, hold high the banner of "being a good person and doing a good job in spring", and diligently pursue and keep forging ahead for high-quality spring manufacturing.