roofing self drilling screws

The primary structure of a wedge-type anchor consists of a threaded rod, a nut, a washer, and the wedge itself. The threaded rod, often made from durable materials like steel or stainless steel, is inserted into a pre-drilled hole. As the nut is tightened, the wedge is forced against the inner wall of the hole, causing the anchor to expand. This expansion generates a powerful frictional force that locks the anchor in place, providing exceptional holding power.

...

Secondly,the desired holding power is another important factor to consider when selecting the correct wedge, bolt, and drill size. The holding power of a fastener is determined by its diameter, length, and thread pitch. Generally speaking, larger fasteners with higher thread pitches provide greater holding power. However, it's important to ensure that the fasteners you select are appropriate for the thickness of the material being fastened. If the fasteners are too large for the material, they may not be able to penetrate the material fully, resulting in reduced holding power.

...

Tek screws are known for their exceptional holding power and shear strength. They are typically used in conjunction with a tapping tool during installation, allowing them to cut their own threads as they are driven into pre-drilled holes They are typically used in conjunction with a tapping tool during installation, allowing them to cut their own threads as they are driven into pre-drilled holes They are typically used in conjunction with a tapping tool during installation, allowing them to cut their own threads as they are driven into pre-drilled holes They are typically used in conjunction with a tapping tool during installation, allowing them to cut their own threads as they are driven into pre-drilled holes12 tek screw. This self-tapping feature not only speeds up the installation process but also ensures a precise fit, reducing the risk of stripped threads or loosening over time.

...