Hexagonal cylindrical head three combination screw

Hexagonal cylindrical head three combination screw is a commonly used mechanical connection, it has a hexagonal design, can be rotated using a hexagonal wrench, has a large torque transmission capacity. Cylindrical head design makes it can be used in a limited space, and has a certain aesthetic. The triple combination screw is composed of threaded, semi-threaded and unthreaded three parts, which can be used on different materials.