The main difference between the combined screw and the ordinary screw is more than the ordinary screw with a spring pad or a flat pad, in or is the three combination parts, with a spring pad.This is the main appearance difference between the combination screw and the common screw.

When customizing the combination screws, sometimes poor quality combination screws will be ordered, and the quality problems of the combination screws generally have several situations:

Quality problem of assembly screws

One is the production of the combination of screws, wire has a problem.Lead to the production of the screw will appear head shot problem.If the mark on the head of the screw is very shallow, we can still use it.

But when the marks are deep and many, not only will affect the appearance, but also can not be used.

Or the diameter of the wire used is too large or too small, and in most cases the diameter of the thread produced will be too large or too small, resulting in inability to assemble.

Two are not well debugged when adjusting the machine, or there is something wrong with the mold used, and there will be something wrong with the produced screws.

The third is the design of the combination screws.Sometimes the head is too big, the groove of the screw is deep, and the customer is not willing to add R Angle under the head of the screw, etc.

This kind of screw is very difficult to make in the production, the screw will break if you are not careful, even if it is produced, the customer will easily break when using.Combination screw quality problems, there are many reasons, here is just a simple talk about a few.