metal expansion nut

The heavy hex head bolt consists of a threaded shank and a large hexagonal head, which provides a larger surface area for better grip and torque transmission. The head design also prevents the bolt from turning during installation, ensuring a secure fit. The thread pitch and diameter of the bolt are crucial factors that determine its mechanical properties, such as tensile strength and shear strength. Generally, heavier bolts have greater strength due to their increased material volume.

...

Both the 5% and 16% self-drilling screws offer several advantages over traditional drilling and fastening methods. First and foremost, these screws eliminate the need for separate drilling equipment, saving time and reducing labor costs. By combining the drilling and fastening processes into one step, self-drilling screws streamline the installation process and improve overall efficiency. Additionally, the self-drilling feature minimizes the risk of splitting or damaging the workpiece, resulting in a cleaner and more professional finish.

...

One of the main factors that can influence the price of full threaded rod 3/8 is the material it is made from. These rods are typically available in a variety of materials, such as stainless steel, carbon steel, and aluminum. Stainless steel rods, for example, are known for their corrosion resistance and durability, but they tend to be more expensive than carbon steel rods. The material chosen will depend on the specific requirements of the project and the desired level of durability.

...