Hexagonal head self tapping screws

The material of hexagonal self tapping screws is generally carbon steel, stainless steel, copper, etc. Surface treatment generally includes methods such as galvanizing, phosphating, oxidation, and painting to extend service life and improve corrosion resistance.

Used for the connection between gypsum board and metal keel with a thickness not exceeding 2.3mm, available in black phosphating and yellow zinc coating options. The scope of application and purchase price of both are basically the same. And yellow zinc has a slightly better rust prevention effect, and the product's natural color is light, which is not easy to fade after coating decoration.

The common specifications for hexagonal self tapping screws include M2, M2.5, M3, M3.5, M4, M5, M6, etc. Where M represents the nominal diameter, and the number represents the number of threads per inch. Common sizes include 12mm, 16mm, 20mm, 25mm, 30mm, etc.

1. Before installation, ensure that the size of the screw opening matches the size of the hole;

2. To drill a hole first, the diameter of the hole is slightly smaller than the diameter of the screw;

3. When using self tapping screws, it is important to control the force and avoid excessive force to prevent the workpiece from cracking;

4. Pay attention to the length of self tapping screws, and the depth should not be too shallow, otherwise it is easy to loosen and fall off;