The Hillman Group 812075 Hot Dipped Galavanized Hex Lag Screw, 3/8 x 4-1/2-Inch,

Product Description Hot galvanized, Hex head. Gimlet point. Suitable for use in treated lumber. From the Manufacturer Hex Lag Screws are used for directly fastening into wood surfaces. They are used with a lag shield, and lag screws can be used in masonry applications. The hex head is six-sided and ideal for easy driving and quick installation. The threads on lag screws are designed to embed into the wood, rather than relying on a nut to secure the connection.