Bolts come in a variety of shapes, which can be mainly divided into the following categories:
Hexagonal head bolts: The head is hexagonal, often used for mechanical fastening, and easy to turn with a wrench. Stud bolts: Both ends have threads, one end is screwed into the connected part, and the other end passes through the other connected part and is tightened with a nut. Hexagon socket head bolts: The head is cylindrical with a hexagonal countersunk hole, suitable for compact spaces. T-slot bolts: Used with the T-slot on the machine, it is easy to load from the end of the T-slot. Anchor bolts: One end is buried in concrete, used for the installation of mechanical components on concrete foundations. Butterfly bolts: Tightened by hand, suitable for occasions that require frequent disassembly. Eyebolts: With an eye shape, used to pass wire ropes or hang hooks. Countersunk bolts: The head does not expose the surface, suitable for occasions where the force is not large and the head does not want to be exposed. Semi-circular head square neck bolt: The head and neck are square, embedded in the groove of the connected parts to reduce the protruding height.
Square head bolt: The head is quadrangular, suitable for occasions with low requirements on mechanical properties.
