Hexagonal flanges with washers and drilled tail screws

Countersunk self tapping screw is a type of screw with a special spiral groove. Its head is designed to be flat and has many toothed structures on the surface, allowing it to self drill into the material surface and form a firm fixation. Countersunk self tapping screws are widely used for fixing various materials, such as steel, copper, aluminum, wood, and so on.

Working principle of countersunk self tapping 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.

Precautions for countersunk self tapping screws:

1. Angular countersunk head self tapping screws: The countersunk head pins of this model are angular and suitable for fixing wood, gypsum board, and metal board.

2. Flat headed countersunk self tapping screws: This model of countersunk head has a flat head shape and is suitable for fixing plastic products, iron plates, and other hard materials.

3. Round head countersunk head self tapping screw: This model of countersunk head has a round head shape, beautiful appearance, and is suitable for fixing decorative materials, such as ceilings, wooden doors, and wooden floors.

4. Special shaped countersunk head self tapping screws: Some self tapping screws have very special countersunk head shapes, such as star shaped, cross shaped, etc. These models are generally used in situations that require special fixing effects.