GRK Fasteners RT Series 119079 Screw, #8 Thread, 2-1/2 in L, Trim Head, Star Drive, Zip-Tip Point, Steel, Climatek, Gold

RT™ reverse thread trim head screws are optimized for use with all composite, PVC and Capstock decking and exterior trim. It leaves a clean look as the tiny heads disappear when countersunk. Approved for use in all applications that include pressure-treated lumber.