What are the tail types of the phillips self tapping screws?

Basically, each phillips self tapping screws is composed of a head and a rod. Specifically, it is composed of the head diameter, the head thickness, the thread diameter, the thread length, the thread type, and the form of the thread tail. So, do you know which types of tails are used for the self-tapping screws?

The common phillips self tapping screws are: AB, B, BP, A, C type ordinary self-tapping screws. The C-type has a screw and high screw-in torque. With the introduction of self-squeezing self-tapping screws, it has been gradually abandoned and is no longer recommended for new designs. The only difference between the AB, B, and BP cross-tapping screws is the different end patterns. The AB type is pointed and the tail is threaded, the B type is flat tailed, and the BP type is unthreaded and pointed. Type A is also threaded at the tip end. The distinction between AB teeth and A teeth is very simple. The tooth distance of AB teeth is smaller than that of A teeth.

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