What causes the m4 security screws to have a large tolerance?

Many customers will care whether the size of the m4 security screws we produce is correct, which is related to whether they can use the problem. Under what circumstances will the screw size be incorrect? The tolerance of the M4 anti-theft screw is very different.

1. Look at the size of the m4 security screwsdrawing.
2. There is a problem with half of the machine production.
3. There is no problem with the tolerances after the head is opened and the thread are finished. However, after the surface treatment of the m4 security screws, the thickness of the plating layer is increased and the tolerance becomes larger.

If you want to customize m4 security screws, please send an email: annie.li@szsst88.com