Supply GB bolts, Yongnian County Bowen Fastener processing GB bolts, we have advanced technology, excellent equipment, high-tech assembly line GB30 bolt, is a professional national standard bolt supplier, reasonable price, complete specifications, allowing you to buy to be assured useful products. Under the dynamic action of the train, its various components must have sufficient strength and stability to ensure that the train in accordance with a predetermined maximum speed, safe, stable and uninterrupted operation. Force by way of connection points: points common and have reamed hole with. Force major general carry axial and transverse force can carry less demanding. Supply GB GB bolt bolt processing, Yongnian County Bowen GB bolt fasteners specializing in processing, we have advanced technology, excellent equipment, high-tech assembly line, is a professional supplier of bolts GB, reasonable price, complete specifications. In 1986, our country for the development of a new standard standard GB bolts, commonly known in the business as a new standard, the most used mainly GB5780, GB5781, GB5782, GB5783, GB5784. GB5780 hexagonal head and a thick shaft and a half Screw Yongnian GB bolts, its accuracy rating for C-level products, available GB5782 instead (GB5782 hexagonal head thick shaft whole tooth screw, its accuracy until the level of A-class and B-class.) 4.8 New factory bolt bolt _GB30 | Bowen _ GB bolts provided by Yongnian County Bowen fasteners. Yongnian County Bowen fasteners (www.bwjgj.com) quality services and products, and are subject to approval and confidence in the new and old customers and the industry. Our company is a certified member of the whole network Commercial Union, Commercial Union customer service icon on the page, you can talk directly with our customer service staff, to our future cooperation happy!