How to prevent self-tapping screws from bending when hardened?

For those who often use self-tapping screws, it is obvious that self-tapping screws must undergo heat treatment, which is what we usually call hardening. Since self-tapping screws or screws are used for drilling and tapping to achieve tight connections, this requires the self-tapping screw itself to have strong hardness so that it can function.
For the newly produced self-tapping screws, the wire rod of the self-tapping screw itself is not hard enough to meet the customer's requirements. At this point we need to heat treat the screw, that is, harden the screw. At the time, we tended not to pay attention.



Therefore, whether we are hardware manufacturers or consumers, we should understand that during the heat treatment and hardening process of self-tapping screws, we should pay attention to the above points to prevent defective products or damage to the screws.