According to the design, the bulge deviation of Torx screws is better than that of slotted screws. This change in design comes from the widespread use of automatic torque control screwdrivers used in factories. The Torx countersunk head screws produced by our company are made of titanium alloy, which are characterized by high strength, high thermal strength, good corrosion resistance, good low-temperature performance, high chemical activity, small thermal conductivity elasticity, etc.