Simpson Strong-Tie TBG1260R1500 #12 x 2-3/8" 0.390" Head Diameter 0.175" Shank Diameter #3 Square Drive Flat Head Tapping Threads 14 TPI 2.375" Max Grip Length #4 Drill Point with Wings N2000® Mechanically Galvanized Strong-Drive® TB WOOD-TO-STEEL Screw (1,500 ct)