Combination screw, many purchasing personnel may not know what is called combination screw, is how the screw.The following is a brief introduction to what is called composite screws.Simply put, there are two combinations and three combinations of combined screws.The head has the round head, namely the pan head and the outer hexagonal head.Combination screw refers to the pan head screw or outer hexagon bolt with elastic flat pad screw composed of three components.

The role of the combined screw is also very simple, is to fasten the product objects.Because it is a spring pad to rub the teeth on the screw, there is no need to match the spring pad when using.And in use, the combined screw has a particularly large role, is the loosening effect.

The advantage of the combined screw is that it saves the time of manual matching of the elastic flat pad, and improves the efficiency of making screws that are especially used by some electronic and electrical manufacturers.There are some manufacturers with many screws, and some products need to be used with elastic flat pads when making screws.One by one.It takes time and effort, and besides, it costs a lot of money.