Is mold opening necessary for extra long m4 bolts?

For screw manufacturers, they have not made screws, if there is no mold must open the mold. Do you also need to open mold for extra long m4 bolts?

Whether the extra long m4 bolts need to be mold-opened depends on whether the factory has a mold of similar size and shape. For the screw manufacturer of The Shi Shi Tong, in the production of so many long screws, also dare not say that the production of extra long m4 bolts does not need to open mold. Because the customers do not use the length of the screw, the length of the thread, the shape of the thread, and so on have different requirements.

In one case, the die must be opened. Some customers will want to print the logo on the screw, so if the screw manufacturer wants to produce the desired effect by the customer through cold heading, it needs to open the mold to complete the shape required by the customer.

Of course, sometimes it is not necessary to open the mold, that is, the extra long m4 bolts are produced by welding or CNC. So whether we need to open the mold or not depends on a lot of factors.

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