Why the combination screw can't pass the stop gauge

Many purchases or projects sometimes find self tapping metal screws. When used on product materials, it is impossible to pass the regulation, that is, the regulations are not available, and the rules cannot be stopped. When the product material is used as a combination screw, it cannot be twisted into the product material, or when it is used with a nut, it cannot be twisted into the nut. Or twist the product material or nut. So what is the reason for the combination screw to pass the stop gauge?

The last time I briefly described the analysis of the easy-to-break cause of the spring washer in the combination screw. So now let's talk about the reasons why the combination screw can't pass the stop gauge.

The thread in the combination screw can't pass the stop gauge. It may be a problem with the screw wire, or the screw wire is too large, or the screw wire is too small, or the quality of the screw wire material. The quality of the bad screw wire, the teeth that come out, certainly not good, can not pass the stop gauge. Another reason is the double destruction of pickling screws and electroplated screws. As a result, the combination screw thread can not pass the stop gauge. During the pickling process, the combined screw threads are washed out and the wash is not full. The thread is becoming smaller. When the combination screw is plated, the thread diameter of the combination screw is too large or the plating layer is too rough, which will lead to the failure of the pass regulation.

Finally, there is another reason why the combined screw thread can not pass the stop gauge. The collision between the combined screws causes the screw to be deformed by the thread, the thread is bumped, and the through-stop can also be caused. Of course, there are still many reasons why the combined screw thread cannot pass the stop gauge. These are just a few of them. But it is the main reason.