Hexagonal self-drilling screws are specially designed screws with hexagonal nuts that are commonly used in applications requiring higher torque and stronger fixation. Hexagonal self-drilling screws usually provide better fastening and tensile strength than conventional screws. At the same time, it also has self-tapping function, can be directly in the material drilling and tapping, avoiding additional pre-drilling steps. This kind of screw is often used to fasten the metal and the thin plate material, such as the steel structure, the metal component and so on domain.