Butterfly screws, also known as toggle bolts, are a type of fastener that features a pair of wings that fold during installation and expand once they are inside a pre-drilled hole. The design allows for a stronger grip on hollow walls, such as drywall, where regular screws might not provide sufficient anchoring. Butterfly screws are particularly useful for mounting heavier items like televisions, where the risk of falling can be a significant concern.

2. Self-Drilling Capability With their sharp, pointed tips, galvanized Tek screws can effortlessly penetrate metal and wood, eliminating the need for additional drilling tools. This feature contributes to faster installation and reduces labor costs.

4. Corrosion Protection Applying protective coatings to anchor bolts can help prevent corrosion. Galvanization and other protective treatments can significantly enhance the longevity and durability of these critical components.

3. Alignment Ensure that materials are aligned correctly before driving the screw to maintain a flush finish and prevent potential damage.

The term 16mm refers to the length of the screw, which is about 0.63 inches. This size is particularly useful in various applications, offering enough length to secure materials without penetrating too deeply, thus maintaining structural integrity. While they come in various diameters and thread configurations, 16mm self-drilling screws can generally accommodate a range of thicknesses in materials, making them a popular choice in construction and industrial applications.