SPAX 4571010801005 5/16 x 4" Hex Drive Washer Head Zinc Powerlag Screw (50 Pieces per Box)

Check out our Threads! Our patented thread serration technology allows the screw to be driven faster, reduces splitting in wood, and reduces driving torque by 40 percent. Let the SPAX FACTOR take some of the hassle out of your next project., The ideal replacement for the conventional lag. IRC/IBC Code Compliant: TER-No. 1912-07, Engineered and Manufactured in the USA, SPAX 5/16-in. Hex PowerLags require a 7/16-in. Hex Driver, Common applications: Landscaping timber, deck ledger attachment, fencing, exterior treated lumber, structural wood to wood connections