Ristiühenduskeermikud

Ristiühenduskeermikud, also known as self-tapping screws or thread-forming screws, are a type of fastener designed to create their own mating threads when inserted into a pre-drilled hole in a material. Unlike standard screws that require a pre-tapped hole, ristiühenduskeermikud deform the material to form a secure connection.

The design of ristiühenduskeermikud features a special thread profile that is often sharper and more aggressive than that of a standard screw. This allows them to cut into materials like metal, plastic, or wood. As the screw is driven, the threads displace or cut away a small amount of material, forming a strong, self-locking thread.

There are several types of ristiühenduskeermikud, each suited for different applications and materials. Some common variations include thread-cutting screws, which have a cutting flute or slot at the tip, and thread-forming screws, which displace material without cutting. The choice between these depends on the material's hardness and the desired strength of the connection.

Ristiühenduskeermikud offer several advantages, including reduced assembly time and cost due to the elimination of the tapping operation. They also provide a strong and vibration-resistant joint, as the formed threads create a tight fit. Their use is widespread in automotive, electronics, construction, and appliance manufacturing.