M2 Custom stainless steel CD vein black PVD precision screw

Industry knowledge：

Why is the head of round head Torx screw not round?

In the screw production process, it is sometimes found that the screw head is not round, and the more common is the round head Torx screw. So what is the reason for this? Next, let’s take a look:
1. It may be due to the mold. One reason is that the workers do not allocate the mold properly, resulting in deviation; The other is the problem of the mold itself. The position of the head is not done well, and the head shape does not meet the requirements of the finished screw.
2. The gap between the die and the die hole is too large and is not parallel after locking
3. The oil supply of the production machine is too little and not lubricated enough, which is not conducive to the cold heading of the screw head in all aspects
4. It may be the reason for the production of raw screw wire rod, and the raw material material is unqualified.