The basic characteristic of a screw is that it is a mechanical component that uses the principle of inclined planes and friction to achieve a fastening function. Its core structure is a shank with external threads. Rotation generates axial force to connect and fix multiple parts. It typically consists of four parts: head, shank, threads, and tip. Screws are widely used in various scenarios, from electronic products to construction engineering.
Depending on their application and structure, screws can be divided into various types, such as machine screws, self-tapping screws, and woodworking screws. They are also made of diverse materials, including carbon steel, stainless steel, and aluminum alloys, to meet the strength and corrosion resistance requirements of different environments.
Their head shapes (such as countersunk head, round head, and hex head) and actuation methods (such as Phillips head, slotted head, and socket head cap screws) also vary to meet different installation space and torque requirements.
