Countersunk self drilling screws

The working principle of countersunk self tapping screws is very simple. When it is inserted into the surface of the material, its built-in spiral groove will directly cut the material into appropriately sized holes. As the screw rotates, the toothed structure of its head will wrap around the material, allowing the screw to stay in place.

This type of screw has a drilled or pointed tail shape at the end, without the need for auxiliary processing. During assembly, the screw can drill a central hole on its own, and then use adjacent threaded parts to self tap and extrude the matching thread in the hole on the carrier. Therefore, it is called a self drilling self tapping screw. It is mainly used for fixing colored steel tiles in steel structures and can also be used for fixing thin sheet materials in simple buildings, but cannot be used for bonding and fixing metal to metal.

1. Quick automatic drilling, drilling, tapping, and locking are completed in one go.

2. High construction efficiency, maximizing time savings, ensuring work efficiency, and improving economic benefits.

3. Strong binding force, high pre tightening force, and high stability.

The difference between countersunk self tapping screws and flat headed self tapping screws. Countersunk self tapping screws refer to self tapping screws that, after tightening, have a head that is not higher than the flat surface being driven in, and can maintain a flat and beautiful surface. This type of screw has different grooves such as a straight groove, a cross groove, and a plum blossom groove, and the grooves should extend to the center of the screw to effectively prevent chips from blocking the groove.The difference between countersunk self tapping screws and flat head self tapping screws

① Different appearance

The hat of a countersunk self tapping screw has one side flat, while the other side has a taper; The hat with a flat head self tapping screw is flat;

② Using different contact surfaces

The contact surface between the countersunk self tapping screw and the work piece is a conical surface, while the flat headed self tapping screw is indeed a flat surface;

③ Different partners

Countersunk self tapping screws can only be used in conjunction with washers with a certain degree of taper, while platform self tapping screws can be used in conjunctio