How to detect the surface of the combination screw

After the combined screw is produced, it is necessary to inspect the combined screw, for example, the surface of the combined screw. What needs to be tested on the surface of the combination screw?
1. First, look at the shape of the surface of the combination screw, and see if there is any problem with the production quality, such as whether there is a screw headshot, the size of the combination screw is wrong, and whether the combination screw thread has passed the stop gauge.
2. Combined screw electroplating testing, for example, for the salt spray test of what color the combined screw is electroplated, see if the combined screw salt spray test time can meet the customer's requirements.
The surface inspection of the combination screw is so simple, it looks relatively simple, but the surface detection of the combination screw is related to the quality of the combination screw. Only the surface inspection of the combination screw can better ensure the quality of the combination screw.

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