Combination screw refers to two fasteners combined in a combination, generally there are two combination screw （screw+flat washer or spring washer）and three combination screw(Also called Triple screw), two combination is only two parts（screw+ flat washer or spring washer） of the combination, three combination refers to three fasteners （screw+flat washer+spring washer）combined together.  So let us talk to you: how is the combination of screws produced?  

Take three combination screws for example, generally the three parts of the standard parts of the first production and processing, one is the production of screws, a spring washer, the third is flat washer, the three standard parts of the production of good, we have to put them together.  First a screw with a spring washer, then a flat washer.  After the match, rub the teeth, fasten the flat pad and spring pad to the screw, so that the spring pad and the flat pad will not fall off from the screw thread.  How to combine a large amount of screws, we will consider directly using automatic spring and flat pad combination screw machine for production, if the amount is small, generally using mechanical spring gasket cost is too high.  Wear elastic flat pad with manual, of course, with manual and machine than, of course, the speed is a lot slower.  

Combination screw commonly common have these a few kinds: pan head cross combination screw, hexagon socket combination screw, still have the combination screw of a few other types, this should look according to specific scene.  No matter what kind of combination screw you want, we can make it according to your requirements.