In the application of fasteners, chipboard screws and self-tapping screws are mostly used in the furniture field. Since the chipboard screws and countersunk head self-tapping screws are very similar, people often confuse these two kinds of screws. Although both chipboard screws and countersunk head tapping screws are a kind of tapping screws, there are still differences between the two.

Chipboard screw is used to replace the wood screw in many cases nowadays. Its application is very wide. The appearance of the chipboard screw is generally black, with countersunk head, semi countersunk head, round head, etc. The screw thread is spirally raised in a single line. Generally, it is a full tooth. There are 3 mm, 3.5 mm, 4 mm, 4.5 mm, 5 mm, 6 mm, and other specifications. In practical application, the most commonly used ones are 4 mm, 5 mm, 6 mm.

Chipboard screws are advanced in technique, and this kind of screw is not easy to crack. In some hardwood, the problem of cracking in the fixed position can also be solved by changing the screw thread design of ordinary chipboard screw to make it a claw cutting chipboard nail. Chipboard screws are most suitable for wood materials and suitable for the installation of power tools. At present, they are mainly used in furniture manufacturing, cabinets, and other fields.

The chipboard screws produced by Alfirste are worth choosing in terms of quality and price.
Countersunk head tapping screws have many head types. Generally, countersunk and pan heads are commonly used. The surface treatment is generally galvanized into white. There is a drill-like tool at the tip. In practical applications, many people install it into the wood, while the main use of it is to be installed into the thin metal plates, like connecting between thin iron sheets and thin iron plates. The thread of the countersunk head self-tapping screw rises in a lapped spiral, but the thread is smaller than the chipboard screws, and its thread surface has a higher hardness. Therefore, in the connection of thin metal plates, internal threads can be tapped in the threaded bottom holes of the connected parts to form a connection.

Therefore, from the design and application of countersunk head tapping screws, we can conclude that self-tapping screws such as countersunk head tapping screws are not suitable for wood.

1: Self-tapping screws such as countersunk head tapping screws have shallow threads and cannot provide sufficient tension when used for wood such as particleboard. Iron objects have higher hardness, so they can provide sufficient tension.

2: When the screw is screwed in, the connected part will form a threaded hole. The shallower the thread, the smaller the deformation. When a hard object like iron with sufficient tension is screwed in, the smaller the deformation, the easier it is to screw in.