Tek screws, also known as self-drilling screws, are specially designed fasteners that eliminate the need for pre-drilling holes in the materials being joined. They feature a drill point at the tip, allowing the screw to penetrate and create its own hole as it is driven into the material. The term Tek is derived from the brand name of a popular series of self-drilling screws, but it has become a generic term within the industry.

In the automotive industry, T-head screws are regularly employed in assembling components like engine mounts and chassis parts, where stability and strength are paramount. Furthermore, in machinery, they are often used in conjunction with nuts or T-nuts to secure fixtures and equipment which require tight and reliable connections.

The choice of materials in bolt construction is paramount as it directly influences the strength and durability of the component. Common materials used for bolts include high-carbon steel, stainless steel, and alloy steel, each offering different mechanical properties to suit specific environments. For example, stainless steel bolts exhibit excellent corrosion resistance, making them ideal for applications in maritime environments and industries that handle corrosive substances. In contrast, high-carbon steel bolts offer enhanced tensile strength, which can be critical for high-stress applications.