Simpson Strong-Tie Strong-Drive SDWS SDWS22400DB-R50 Timber Screw, 4 in L, Serrated Thread, Washer Head, Steel, Tan

The Strong-Drive® SDWS timber screw is designed to provide an easy to install, high-strength alternative to through-bolting and traditional lag screws. This screw is ideal for the contractor and do-it-yourselfer alike. It is code listed in IAPMO UES ER-192 and meets 2018 and 2021 IRC® and IBC® code requirements for most common wood framing applications.