Self Drilling Screws – Modify Truss Phillips (TPZ) Zinc Plated #8 x 1-1/2" (4.2x38mm) (450 PCS) are designed for quick and efficient fastening in metal and sheet applications without the need for pre-drilling. Manufactured from durable carbon steel (C1022) and coated with zinc plating, these screws provide excellent strength along with corrosion resistance.The self-drilling (TEK) point allows drilling, tapping, and fastening in a single step, significantly reducing installation time. The modified truss head (TPZ / Phillips) offers a wider surface area, ensuring better grip and minimizing surface damage during fastening.