The special screw of the screw factory is that the model and size of some national standard screws are different, resulting in special screws. Become a non-standard screw. For example, the national standard head size of some screws is 8, while the special screw may be 7, or even 10. Therefore, the length dimension, tolerance range, material grade strength, etc. of all aspects of the national standard screw, if it does not meet the national standard screw length dimension. It will lead to a special screw.





Special screws are generally not readily available. That is to say, the general screw manufacturer will not have stock. This special screw needs to be customized. Customers need to provide screw drawings or screw samples before production and processing. The customer provides the screw drawings or screw samples, and our manufacturer can order the head mold and the tooth plate according to the screw drawings or screw samples. Even if there is no screw material, we have to order the screw wire.

 Under normal circumstances, the unit price of special screws will be relatively high. And if there is no quantity, it is not easy to produce. Because the cost of ordering molds is relatively expensive, some special screws, such as step screws, need 3000-5000 yuan or even more to order a screw mold. Therefore, if there is no quantity, it is difficult to produce.