Drill holes according to the diameter of the inner hexagon to meet the requirements.

Use a cold heading machine to upset the hexagonal socket screws. A single piece can be punched with a hexagonal punch and hammered out. Similar to countersunk screws, the head of the screw is embedded in the machine and has a high connection strength, but the screw must be installed and removed using a corresponding hexagonal wrench. Generally used on various machine tools and their accessories.

Hexagon bolts are classified according to the hardness, tensile strength, yield strength, etc. of the screw wire, which is the grade of the hexagon bolt and what grade the hexagon bolt is. Different grades of hexagonal bolts are required for different product materials, and all hexagonal bolts have the following grades: