When we use non-standard screws, we will find that the bottom of some non-standard screws is not shiny. Do you know why? Today weigao Bolt Factory will explain to you the reason why the bottom of non-standard screw thread is not bright.
The main reason for non-standard screw thread bottom not shiny is in many cases, but the main reasons for non-standard screw thread bottom thread not shiny are as follows:
1. The anti-skid teeth are too deep when the dental plate manufacturer leaves the factory.
2. When the master adjusted the machine, the sharp tail could not be formed or repaired for other reasons, which was caused by the deepened anti-skid teeth
3. Technical problem of China Nut master (this kind of possibility is small)
