Self Drilling Screws – Modify Truss Phillips (TPZ) Zinc Plated #8 x 2" (4.2x50mm) (450 PCS) are engineered for fast, efficient fastening without pre-drilling. Made from high-quality carbon steel (C1022) and coated with zinc plating, these screws provide excellent strength along with corrosion resistance. The self-drilling tip allows the screw to drill, tap, and fasten in one operation, saving time and improving productivity on-site. The modified truss head (TPZ / Phillips) offers a wider bearing surface, ensuring better grip and reduced surface damage during installation.