Simpson ECC66HDG End Column Cap Hot Dip Galvanized Flat Head 410 Stainless Steel Concrete Screws this screw features underhead nibs this screw features underhead nibs and a Type 17 fast start point that drive easily and countersink smoothly into wood deck boards and transfer loads across critical connections The seat of the column cap features additional surface area beyond the side of the column to allow added area of bearing to distribute the load from the beam and provide enhanced support for the connection Connection Type: Provides strong end of beam connection for column to beams and the extended area of the column seat offers additional surface area of bearing to distribute the load