Simpson Strong-Tie SDWS27400SS-RP1 Strong-Drive® SDWS™ TIMBER Screw — 0.275 in. x 4 in. T50, Type 316

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 2018 and 2021 IRC® and IBC® code requirements for several common wood framing and engineered-wood applications.