Key Features
Built for Salt Air Type 316 stainless steel makes this screw a practical choice for coastal and marine work where standard fasteners give up fast. If the job lives near water, corrosion resistance is not optional. Fast Structural Drive The SawTooth point starts quickly and is designed to reduce or eliminate predrilling and counterboring in most wood-to-wood applications. That means faster installs with less setup and less fighting the fastener. Heavy Timber Grip The Simpson Strong-Tie SDWS27600SS Strong-Drive SDWS Timber SS Screw uses a 0.275 inch shank, a large washer head, and a deep T50 6-lobe drive to handle structural fastening without the usual cam-out and surface damage headaches.
Overview
The Simpson Strong-Tie SDWS27600SS Strong-Drive SDWS Timber SS Screw is a 6 inch structural wood screw built for heavy-duty wood-to-wood fastening in coastal and severe-corrosion environments. This is a structural wood screw designed for wood-to-wood and engineered-wood connections. Model Number: SDWS27600SS. If you are fastening ledgers, pier framing, boardwalk members, wharf components, or other exposed timber where corrosion resistance matters as much as holding power, this is the kind of fastener you spec on purpose.
What makes this screw matter on the job is that it is meant to replace slower, more cumbersome fastening methods like spikes, lag bolts, lag screws, and in some cases through-bolting. The 0.275 inch shank diameter gives it the mass needed for structural applications, while the SawTooth point is designed for fast starts with no predrilling in most applications. Simpson also calls out that no counterboring is required for most installs, which cuts out a step and keeps crews moving.
The head and drive design are doing real work here too. You get a 0.650 inch washer head that spreads load over a wider area than a typical screw head, and the nibs help the head seat flush with reduced splintering. That matters when you are fastening treated lumber, structural timbers, or decking assemblies and want a clean seat without chewing up the surface. The deep T50 6-lobe recess gives the driver bit more engagement, so you are less likely to strip the recess or deal with cam-out once resistance builds.
From a design standpoint, this is a purpose-built timber fastener, not just a long wood screw. The thread pattern, 3 inch thread length, washer head profile, and SawTooth point are all geared toward driving into substantial wood members efficiently. There is also mid-shaft knurling noted in supplementary product data to help reduce driving torque. On a long run of installs, anything that lowers resistance and keeps the screw tracking cleanly into the wood saves time and strain on both the tool and the user.
Material choice is a big reason to buy this version over a standard structural screw. The Type 316 stainless steel construction is intended for marine and coastal applications, including piers, boardwalks, wharves, and ledgers. In other words, this is the version you reach for when the environment is working against every fastener on site. Salt air, moisture, and harsh exposure are exactly where cheap hardware turns into callbacks.
On the application side, Simpson lists this screw for structural wood-to-wood and engineered-wood connections. It is also part of a code-recognized fastening family for several wood framing and ledger-style applications, with published spacing and load information available from Simpson Strong-Tie. That is important for builders and remodelers who need a fastener that is not just convenient, but backed by actual technical data for real structural work.
The specific SDWS27600SS version is 6 inches long with a 5 threads-per-inch pattern and packaging quantity of 300. That length gives you the reach needed for thicker members and heavier assemblies, while full-penetration guidance and published spacing requirements help with proper installation in structural lumber. If your work includes exterior framing, waterfront structures, deck ledger fastening, or heavy timber repairs in aggressive environments, this screw is built for that lane.
Who should buy it? Contractors, deck builders, marine carpenters, general contractors, and serious DIY users working on exposed structural wood assemblies. If you are doing interior trim or light-duty decking, this is overkill. If you are fastening structural members where corrosion, code, and long-term hold matter, the Simpson Strong-Tie SDWS27600SS Strong-Drive SDWS Timber SS Screw is the right kind of overbuilt.
Made for Coastal Structural Work
This screw is built for the kind of jobs that destroy ordinary fasteners. Marine piers, boardwalks, wharves, and exposed ledger connections are exactly where the Type 316 stainless steel build earns its keep.
- Type 316 stainless steel for severe corrosion environments
- Listed by Simpson for piers, boardwalks, wharves, and ledgers
Drive Big Timber Without Extra Steps
The whole point of this fastener is to speed up structural wood fastening without giving up strength. The SawTooth point helps it start fast, and in most applications you can skip predrilling and counterboring.
- SawTooth point designed for fast starts
- No predrilling and no counterboring required for most applications
Designed to Seat Clean and Hold Hard
The large washer head gives you more bearing area, while the nibs help the head finish flush with less splintering. Paired with the deep T50 6-lobe recess, it is a more controlled drive than fighting oversized lag screws.
- 0.650 inch washer head with nibs for flush seating
- Deep T50 6-lobe recess helps reduce cam-out under load
Built Like a Real Timber Fastener
Everything on this screw is sized for structural wood fastening, from the 0.275 inch shank to the 6 inch overall length. This is not a general-purpose deck screw pretending to be a timber fastener.
- 0.275 inch shank diameter for heavy-duty structural applications
- 6 inch overall length with 3 inch thread length
Key Specifications
| Material | Type 316 Stainless Steel |
|---|---|
| Length | 6 in. |
| Shank Diameter | 0.275 in. |
| Head Diameter | 0.650 in. |
| Drive Type | T50 6-Lobe |
| Head Type | Washer Head |
| Point Type | SawTooth Point |
| Packaging Quantity | 300 |
Compatibility
Drive Interface Uses a T50 6-lobe drive. Simpson lists replacement driver bit BIT50T-2-R1. Material Compatibility Designed for structural wood-to-wood and engineered-wood connections. Application System Published by Simpson for exterior structural applications including ledgers and heavy timber assemblies with load and spacing data available.
Built For
Marine Construction Deck Ledgers Boardwalk Repairs Piers and Wharves Exterior Framing Heavy Timber Connections General Contracting Remodeling
Pro Tip
Match this screw with a proper T50 6-lobe bit and keep an eye on full penetration into the main member. Simpson’s published load data is based on full penetration, so screw length and side-member thickness need to be considered together, not separately.
Tool Nut’s Take
Tool Nut’s Take
Simpson Strong-Tie SDWS27600SS Strong-Drive SDWS Timber SS Screw for harsh exterior wood jobs
If your project lives near salt water or constant moisture, this is the kind of structural screw you buy once instead of replacing later.
- Who it’s for: Contractors and serious DIY builders working on exposed structural wood connections, especially piers, boardwalks, ledgers, and other coastal assemblies.
- Why it stands out: Type 316 stainless steel, a true timber-screw shank size, fast-start SawTooth point, and a deep T50 drive make it much more jobsite-friendly than wrestling with traditional lag hardware.
- Worth knowing: This is a specialized structural fastener, not a general-purpose wood screw. Make sure your bit matches the T50 drive and verify your embedment and spacing against the application requirements.
Common Questions
- What material is this screw made from? It is made from Type 316 stainless steel for coastal and severe-corrosion environments.
- Does this screw require predrilling? Simpson states the SawTooth point is designed for fast starts and that no predrilling is required for most applications.
- What kind of drive does it use? It uses a deep T50 6-lobe recess.
- What is this screw designed to fasten? It is designed for structural wood-to-wood and engineered-wood connections.
- Where is this screw commonly used? Typical applications include piers, boardwalks, wharves, and ledgers in coastal or otherwise corrosive environments.
Reviews
There are no reviews yet.