How to look at the quality of combination screws

Update:28 Mar 2020
Summary:

When we manufacture and manufacture combination screws […]

When we manufacture and manufacture combination screws and purchasers order combination screws, we often say that the quality of the combination screws is quite good. So how to see if the quality of the combination screw is good! The following is a brief introduction by Manager Wu of Jinchenda Professional Combination Screw Manufacturer:
The quality of a combination screw must start with the screw wire of the combination screw manufacturer. The wire of the screw is the first key to determine the quality of the combined screw. The wire is not good. Even if the production equipment is advanced and the staff is skilled, they cannot produce high-quality combined screws.
Looking at the quality of the combined screw products from the second look, the overall aesthetics of the combined screw is considered. A combined screw has been formed. The size of the head of the screw, the superior appearance of the flat washer, whether the screw thread can pass through the stop gauge and so on. These need to be detected. A good combination screw, its overall standard can meet the national standard requirements, or customer requirements.

Finally, the quality of the combined screw products is viewed from the plating color. Of course, iron combined screws need to be plated, but stainless steel combined screws are not required. Most of them are passivation, in order to increase the salt spray resistance of stainless steel combination screws. On the plating color of the combination screws, some are not well controlled, which will produce a large color difference. This won't look good.