1. Material Composition The “1% 201% 4%” typically indicates a specific ratio of metals used in the alloy, such as stainless steel or another corrosion-resistant material, which enhances durability. Stainless steel screws resist rust and corrosion, making them ideal for settings exposed to moisture or chemicals.

Black hex head bolts are commonly made from steel, often alloyed with other elements to improve strength and durability. The most common grades used in manufacturing these bolts are Grade 8 and ASTM A325, which are known for their high tensile strength. In addition to steel, these bolts may also be made from stainless steel or other materials that offer specific mechanical properties suited for particular applications.

The self-drilling tip, which distinguishes these screws from standard screws, allows them to penetrate through various materials, including metal and wood, without pre-drilling. This feature is particularly advantageous when working with thinner gauge metals or materials where traditional drilling would be cumbersome or time-consuming. As a result, projects can proceed more smoothly, with fewer tools and less disruption.

3. Strong Bond The threading on a self-drilling screw provides a robust hold that is often superior to that of standard screws, particularly in metal applications.