Hex bolts are the most widely used basic components in the fastener field, with a regular hexagonal head and an externally threaded shank as the core structure. By mating with nuts or directly screwing into internally threaded substrates, they achieve detachable and secure connections between two or more parts. The hexagonal head design conforms to mechanical principles, facilitating the positioning and application of force by tools such as wrenches and sockets, while also stably transmitting torque and effectively preventing slippage, making them the preferred bolt type in industrial scenarios. The core structure consists of three parts: the hexagonal head (providing a force application interface), the shank (transmitting loads), and the threaded section (forming a tight engagement). Some special models also feature anti-loosening holes in the head or shank to enhance connection stability in vibrating environments.