The Simpson Strong-Tie SDWS22300DB Strong-Drive SDWS Timber Screw is an exterior-grade structural wood screw built for wood-to-wood fastening. This is a timber screw designed for structural wood-to-wood connections. Model Number: SDWS22300DB. For contractors, deck builders, framers, and serious DIY users, it gives you a high-strength alternative to through-bolting and traditional lag screws with a simpler installation process.

What matters on the job is how fast it starts, how clean it drives, and how well it pulls members together. This screw uses a SawTooth point to help it bite quickly and cut installation effort, which is why Simpson says predrilling is not needed in most applications. The bold thread design increases holding power, while the underhead nibs help the head seat flush with less splintering at the surface.

The head design is a big part of why this fastener works well in structural wood connections. The large washer head spreads load over a wider area than a typical screw head, which improves bearing and helps clamp framing members, ledgers, and heavy wood parts together. The 0.760 inch head diameter and 0.220 inch shank diameter make this a substantial fastener for real structural work, not a light-duty deck screw.

Drive engagement is another practical advantage. This screw uses a T40 6-lobe drive, which gives a more positive bit fit than common Phillips-style fasteners and helps reduce cam-out when you are sinking screws into dense lumber. That means less stripped heads, less wasted motion, and better control when you are driving overhead, along a ledger, or in awkward outdoor builds.

For exterior use, the double-barrier coating matters. Simpson rates it for corrosion resistance equivalent to hot-dip galvanization, making it suitable for certain exterior and preservative-treated wood applications as described in the evaluation report. If you are building fences, pergolas, planter boxes, ledgers, or other outdoor wood structures, that coating is one of the reasons to choose this screw instead of a plain interior fastener.

This specific SDWS22300DB version is 3 inches long with a 1-1/2 inch thread length and comes in tan with a package quantity of 950. That size is useful when you need solid bite into the receiving member without stepping up to a much longer timber fastener. It is intended for wood-to-wood and engineered wood applications, and Simpson also lists it for mass timber connections including CLT wall-to-wall, floor-to-floor, surface splines, and lap joints.

If you want the honest fit, this screw is for users who need a structural exterior wood screw that installs faster than a lag, holds stronger than ordinary construction screws, and leaves a cleaner finished result. It makes the most sense for deck and outdoor structure builders, general contractors, remodelers, carpenters, and experienced DIY users who want structural performance without the extra steps of bolting.

Simpson Strong-Tie SDWS22300DB Strong-Drive SDWS Timber Screw Gets Structural Work Done Without the Lag Screw Hassle

If you want structural bite in exterior wood without dragging out the whole lag screw routine, this is the kind of fastener that earns its keep fast.

• Who it's for: Contractors, deck builders, carpenters, and serious DIY users doing wood-to-wood structural fastening outdoors.
• Why it stands out: The SawTooth point, T40 6-lobe drive, washer head, and double-barrier coating all work together to make installation faster and more reliable than ordinary construction screws.
• Worth knowing: This is a bulk 950-count pack of 3 inch tan screws, so it makes the most sense when you are actually building, not just knocking out one or two repairs.

• What kind of material is this screw designed for? It is designed for fastening wood-to-wood and engineered wood connections.
• Does this screw usually require predrilling? Simpson states the SawTooth point eliminates the need for predrilling in most applications.
• What driver size does it use? It uses a T40 6-lobe drive.
• Is this screw suitable for exterior use? Yes. It uses a double-barrier coating intended for certain exterior and preservative-treated wood applications.