Simpson Strong-Tie Strong-Drive No. 5 Sizes X 4 in. L Star Low Profile Head Structural Screws 2.5 lb

Designed to provide an easy-to-install, high-strength alternative to through-bolting and traditional lag screws. The Strong-Drive SDWS Timber screw is ideal for the contractor and do-it-yourselfer alike. It is code listed under IAPMO UES ER-192 and meets 2012 and 2015 IRC and IBC code requirements for several common wood framing applications.