3. Corrosion Resistance In environments where moisture is a concern, such as outdoor applications or regions with high humidity, it’s crucial to choose screws that are coated or made from materials resistant to corrosion. Galvanized or stainless steel options are available and can greatly extend the lifespan of the fastening.

4. Use Appropriate Materials Selecting the right material based on the environmental conditions can prevent premature failure due to corrosion or fatigue.

Self-drilling screws, also known as Tek screws or self-tapping screws, are engineered with a drill bit tip that allows them to penetrate materials without the need for a separate drilling operation. This feature is particularly advantageous when working with thick steel, as it reduces the time required for assembly and helps ensure a secure, tight fit.

4. Load Capacity The load-bearing capacity of an M20 foundation bolt can vary depending on the grade of steel used. Common grades include 4.6, 8.8, and higher grades, with 8.8 indicating a high-strength bolt capable of bearing significant tensile and shear loads.