From the sleeve rod can be seen the difference between the two, only with bolts, under the action of external forces, the sleeve rod will still twist, move, at this point in the sleeve to play a pin can be.

1, the role of bolts for connection, fastening, and the need to match the use of nuts to achieve his function;

2. The function of the screw is similar to that of the bolt. It is usually used for joining thicker workpieces or without side-mounted nuts.

3. The pins are usually used for positioning, limiting and stopping. According to their different functions, the pins are classified and styled differently. The pins are usually of high surface finish, high dimensional accuracy, and high precision in matching with the holes on the workpiece to be positioned. There are many types of pins for limiting and stopping, such as open pins and stops. Movable pin.