Self Drilling Screws – Modify Truss Phillips (TPZ) Zinc Plated #8 x 1-1/4" (4.2x32mm) (900 PCS) are designed for fast and efficient metal fastening without the need for pre-drilling. Manufactured from high-strength carbon steel (C1022) and finished with zinc plating, these screws offer excellent durability and corrosion resistance for long-term performance.The self-drilling (TEK) point allows drilling, tapping, and fastening in a single operation—saving time and improving productivity. The modified truss head (TPZ / Phillips) provides a wider bearing surface, ensuring better grip and minimizing damage to the material surface during installation.