Simpson Strong-Tie TBP1245R50 #12 x 1-3/4" 0.390" Head Diameter 0.175" Shank Diameter #3 Square Drive Flat Head Tapping Threads 14 TPI 1.75" Max Grip Length #4 Drill Point with Wings Black Phosphate Coating Strong-Drive® TB WOOD-TO-STEEL Screw (50 ct)