Bolts are mainly composed of two parts: head and screw. Bolts are cylindrical with external threads, usually used in conjunction with nuts to fasten and connect two parts with through holes. This type of connection is called bolt connection, which is a detachable connection.
Detailed structure of bolts
Head: The head of a bolt is usually hexagonal, and there are other shapes such as double hexagonal head, spline head, pan head, countersunk head, cylindrical head, etc. The main function of the head is to bear and wrench. Common wrench structures include hexagonal head, twelve-pointed head, spline head, ten-pointed head, octagonal head, square head, crescent head, etc.
Screw: The screw is the cylindrical part of the bolt with external threads, which is used to cooperate with the nut or directly screw into the workpiece. The length and diameter of the screw depend on the specific application requirements and are usually equal to the thickness of the interlayer of the connected parts.
