Cylindrical head hex socket screw, also referred to as hex socket bolt, cup head screw, hex socket screw, its name is not the same, but represents the same meaning.

Shandong Jieyi Machinery Co., Ltd., Founded more than 10 years ago, Jieyi designes, developes and manufactures a wide range of ROTARY UNIONS and VALVES for different applications, combining excellent quality at an affordable price and the excellence of its customer service.

The hallmark of Jieyi is its flexibility and speed of reaction and response, usually within 24 hours, to the needs and requests of its customers.

We've never been one to turn down a challenge or fail to meet the toughest, most stringent demands and needs of our customers. This is what has made Jieyi the industry leader in the design and manufacture of standard and custom rotating unions.

From our skilled engineers and workers to our state-of-the-art facility to our incredible depth of knowledge, you can trust JIE YI to always deliver rotating unions designed and built to the highest standards possible.

We have combined the finest minds in the business, the latest technology and equipment—bringing you stunning, real world solutions.

Rest assured, everyone who touches your project shares your passion for a successful outcome. From the engineers who translate your requirements into product specs to the skilled technicians who operate our state-of-the-art manufacturing equipment to the assembly team who test each unit we make in order to ensure strict quality control.