Get this Spax Hex Drive Washer Head High Corrosion Resistant Coating Lag Screw for delivery. Our patented thread serration technology allows the screw to be driven faster, reduces splitting in wood, and reduces driving torque by 40 percent. The ideal replacement for the conventional lag. IRC/IBC Code Compliant: TER-No. 1912-14. True to size thread diameters, grade 5 heat treat, and the washer head style are just some of this fastener’s distinct advantages. Tested under the toughest scenarios to give you confidence in every connection. The HCR (High Corrosion Resistant) double barrier coating is tested and recognized for use in ground contact and pressure treated lumber for exterior fresh water general construction applications. Engineered and Manufactured in the USA. SPAX 3/8-in. Hex PowerLags require a 1/2-in. Hex Driver. Common applications: Landscaping timber, deck ledger attachment, fencing, exterior treated lumber, structural wood to wood connections.