HDG Hex Threaded Bolt typically refers to a bolt that has undergone hot-dip galvanizing (HDG) and features a hexagonal (hex) head with threads along its length. It is a process used to coat steel or iron with a layer of zinc to provide corrosion protection. This coating helps prevent rust and corrosion, making the bolt suitable for use in outdoor or corrosive environments. These bolts are often used in construction, outdoor structures, and other applications where exposure to the elements might lead to corrosion. HDG Hex Threaded Bolt provides a durable and effective protective coating, enhancing the longevity and performance of the bolt in challenging environmental conditions.