Hexagon bolt is a metal fitting, also known as hexagon screws, hexagon screws or hexagon bolts.

1. Ordinary bolts are divided into three types: A, B, and C. The first two are refined bolts, which are rarely used. Generally speaking, ordinary bolts refer to C-grade ordinary bolts. 2. In some temporary connections and connections that need to be disassembled, C-grade ordinary bolts are often used. Common bolts commonly used in building structures are M16, M20, and M24. Some rough bolts in the mechanical industry may have large diameters and special uses. High-strength bolts 3. The material of high-strength bolts is different from ordinary bolts. High-strength bolts are generally used for permanent connections. Commonly used are M16~ M30. The performance of oversized high-strength bolts is unstable and should be used with caution. 4. The bolt connection of the main components of the building structure is generally connected by high-strength bolts. 5. The high-strength bolts that leave the factory are not divided into pressure-bearing type or friction type.