GRK FASTENERS™ R4™ Multi-Purpose Framing and Decking Screw, #9 Thread, Recessed Star Drive, T25 Drive, 0.061 in Head Height, 1.81 in Thread Length, 2-3/4 in Overall Length, Steel, Finish: Climatek™-Coated, Additional Information: 0.329 in Dia Head, 0.128 in Dia Shank