Simpson Strong-Tie TBP1460R50 #14 x 2-3/8" 0.460" Head Diameter 0.196" Shank Diameter #3 Square Drive Flat Head Tapping Threads 14 TPI 2.375" Max Grip Length #4 Drill Point with Wings Black Phosphate Coating Strong-DriveŽ TB WOOD-TO-STEEL Screw (50 ct)