Simpson Strong-Tie SDWS Timber Screws (Exterior Grade)

The Simpson Strong-Tie Strong-Drive® SDWS Timber Screw (Exterior Grade) is designed to provide an easy-to-install, high-strength alternative to through-bolting and traditional lag screws. Features: • Bold thread design provides superior holding power. • Patented 4CUT™ tip ensures fast starts, reduces installation torque and eliminates the need for pre-drilling in most applications. • Knurled shank section above the threads makes driving easier. • Under-head nibs offer greater installer control when seating the head. • Large head provides maximum bearing area . • Double-barrier coating provides corrosion resistance equivalent to hot-dip galvanization, making it suitable for many exterior and preservative-treated wood applications. • Available in lengths up to 10" for maximum versatility. • Bit included in package. Benefits: • Deep, 6-lobe drive reduces cam-out, making driving easier. • Low-profile head design provides a clean look and less interference after installation. • Designed to provide an easy-to-install, high-strength alternative to through-bolting and traditional lag. screws. The SDWS structural wood screws are ideal for the contractor and do-it-yourselfer alike. Common Applications: Structural Wood-to-Wood Connections. These include Logs, Heavy Timber Beams, Ledgers. Material: Heat-treated carbon steel. Finish: Double-barrier coating. Installation: • Strong-Drive SDWS Timber screws install best with a low-speed 1/2" drill and a T-40 6-lobe bit. The matched bit included with the screws is recommended for best results. • Pre-drilling is typically not required. Where pre-drilling is necessary, use a 5/32" drill bit for Strong-Drive SDWS Timber screws • Screw heads that are countersunk flush to the wood surface are acceptable if the screw has not spun out. Product Resources: Load Tables, Technical Data, and Installation Instructions ER-192 Evaluation Report