Self-tapping screws are primarily used when fastening objects to?

Self-tapping screws are designed to create their own hole and thread as they are driven into materials. This capability makes them particularly suited for fastening objects to sheet metal. The design of the screw allows it to penetrate and secure itself into the metal without the need for pre-drilling, which can save time and increase efficiency during assembly or construction.

Sheet metal applications often require a screw that can firmly hold materials together without stripping or losing grip, and self-tapping screws are engineered specifically for this purpose. They feature sharp points and threads that effectively cut through the metal, allowing for a secure and tight fit.

While self-tapping screws can also be used in wood and plastic, they are most commonly utilized in applications involving sheet metal due to the nature of the material and the need for durable connections in metal construction or fabrication. Concrete is generally not suited for self-tapping screws, as they would not provide a secure hold in such a hard substrate without additional anchoring methods.