The Simpson Strong-Drive SDWH Timber-Hex Screw with Double-Barrier Coating is engineered for structural and general-purpose wood fastening where a hex-head drive is preferred. Measuring 0.195 in. in shank diameter and 6 in. in length, this heavy-duty timber screw delivers reliable holding power in demanding framing and crating applications. Code listed under IAPMO-UES ER-192 and meeting 2015 and 2018 IRC and IBC requirements for common wood framing, it gives contractors and do-it-yourselfers confidence that every connection is backed by proven standards. The Double-Barrier Coating provides corrosion resistance equivalent to hot-dip galvanization, making these screws a dependable choice for exterior and preservative-treated lumber environments.

Key Features

• Double-Barrier Coating - provides corrosion resistance equivalent to hot-dip galvanization, making these screws suitable for use with pressure-treated wood and in exterior applications where moisture exposure is a concern
• SawTooth Point - bites into wood fiber aggressively to start the screw without pre-drilling, saving time and reducing labor on structural and general-purpose fastening jobs
• Large Hex Washer Head (0.650 in. diameter) with 5/16 in. Hex Drive - the oversized head spreads clamping load across a wider bearing surface, reducing the chance of pull-through, while the hex drive allows use of standard impact drivers and socket wrenches for fast, high-torque installation
• 6 in. length with 2-3/4 in. thread engagement - delivers deep, secure thread purchase into framing members, maximizing withdrawal resistance in wood-to-wood connections
• 6 TPI (threads per inch) coarse thread pattern - designed for solid timber and dimensional lumber, the aggressive thread pitch maximizes grip and pull-out resistance
• 0.195 in. shank diameter - a robust shank cross-section resists shear forces in structural framing and heavy-load connections
• Code listed under IAPMO-UES ER-192 - meets 2015 and 2018 IRC and IBC requirements for several common wood framing applications, giving building inspectors and engineers the documentation they need

Why This Product

• The SawTooth point eliminates the need for pre-drilling, which cuts installation time significantly compared to traditional lag bolts - a real advantage on large framing or crating projects with high fastener counts
• The Double-Barrier Coating, equivalent to hot-dip galvanization, means these timber screws hold up in corrosive conditions associated with preservative-treated lumber, giving you a long-lasting structural connection without sacrificing code compliance
• With IAPMO-UES ER-192 code listing and compliance with 2015 and 2018 IRC and IBC standards, these screws are a straightforward choice when engineered or inspected structural connections are required - no guesswork about acceptance
• The Large Hex Washer Head pairs with a standard 5/16 in. hex drive, so these screws work with common impact drivers and socket tools already on the job site, eliminating the need for specialty bits or drivers

Specifications

• Brand: Simpson Strong-Tie
• Shank Diameter: 0.195 in.
• Length: 6 in.
• Head Type: Large Hex Washer Head
• Head Diameter: 0.650 in.
• Drive Type: 5/16 in. Hex
• Thread Length: 2 3/4 in.
• TPI: 6
• Point Type: SawTooth Point
• Coating/Finish: Double-Barrier Coating
• Country of Origin: Taiwan

Available Pack Options

• SDWH19600DB-RP1: 4 Pk
• SDWH19600DB-R12: 12 Pk - includes one 5/16-in. hex driver bit
• SDWH19600DB-R50: 50 Pk - includes one 5/16-in. hex driver bit
• SDWH19600DBMB: 250 Pk - includes one 5/16-in. hex driver bit
• SDWH19600DB: 600 Pk - includes two 5/16-in. hex driver bits

Approved Applications

• Fastening Wood-to-Wood
• Crating

Frequently Asked Questions

Do these screws require pre-drilling before installation?

No. The SawTooth Point on these Strong-Drive SDWH Timber-Hex screws is designed to cut into wood fiber on contact, eliminating the need for pre-drilling. This saves measurable time on projects with a high volume of fastener placements compared to using traditional lag bolts.

Are these screws compatible with preservative-treated lumber?

Yes. The Double-Barrier Coating provides corrosion resistance equivalent to hot-dip galvanization, which makes these screws suitable for some exterior and preservative-treated wood applications where corrosion resistance is required.

What code listings apply to these screws?

The Strong-Drive SDWH Timber-Hex screw is code listed under IAPMO-UES ER-192 and meets 2015 and 2018 IRC (International Residential Code) and IBC (International Building Code) requirements for several common wood framing applications.

What tool or driver is needed to install these screws?

These screws use a 5/16 in. hex drive, compatible with standard hex socket bits, impact drivers, and socket wrenches. No specialty driver is required.