Zhenhai Yongding Fastener is a professional bolt manufacturer and supplier. Its products mainly include heavy hex bolts and other bolts. YongDing bolts has high strength, complete specifications, can be customized on demand, and its application is also very wide. The heavy-duty hexagonal bolts are also a kind of hexagonal bolts, whose heads are larger than ordinary ones, and are mainly used in construction engineering, automobiles, bridges and tunnels.