4 in. Strong-Drive® SDWS T-40 Washer-Head Coarse-Thread SawTooth®-Point Double-Barrier-Coated Timber Screws (600 Pack) | SIM-SDWS22400DB

Simpson Strong-Tie's 4 in. Strong-Drive® SDWS T-40 Washer-Head Coarse-Thread SawTooth®-Point Double-Barrier-Coated Timber Screws are well suited for posts, beams, ledgers, and other critical structural connections. The T-40 star drive delivers enhanced torque transfer and minimizes cam-out during installation. A double-barrier coating system offers advanced corrosion protection for exterior environments and use with pressure-treated lumber. This combination of strength, durability, and installer-focused design makes the screw a reliable choice for professional builders and contractors.

• Designed to provide an easy-to-install, high-strength alternative to through-bolting and traditional lag screws
• Code listed in IAPMO UES ER-192 and meets 2018, 2021, and 2024 IRC and IBC code requirements for most common wood framing applications
• Bold thread design provides superior holding power
• SawTooth® point ensures fast starts, reduces installation torque and eliminates the need for predrilling in most applications
• Underhead nibs allow for head to drive flush to surface with reduced splintering