Simpson Strong-Drive SDWH TIMBER-HEX Stainless Steel Screw - 0.275" x 3" is a Type 316 stainless steel structural fastener engineered as a direct replacement for traditional lag screws in demanding wood-framing applications. The hex washer head and sharp point design allow installers to drive these screws without predrilling in most applications, saving significant time on the job site while delivering the corrosion resistance needed for outdoor, coastal, and chemically exposed environments. These fasteners meet 2018 and 2021 IRC and IBC code requirements for several common wood-framing applications, giving builders and contractors confidence in every connection.

Key Features

• Type 316 stainless steel material and finish - provides maximum corrosion protection in saltwater, coastal, and chemically aggressive outdoor environments where standard steel fasteners would fail prematurely.
• No predrilling required - the sharp point penetrates wood directly, making installation faster and easier than traditional lag screws and reducing labor time on framing projects.
• Hex washer head with 1/2 in. hex drive - the large bearing area distributes clamping load across a wider surface, reducing crushing of wood fibers and improving connection integrity.
• Box thread design with 7 TPI - the unique thread geometry significantly reduces driving torque compared to standard screw threads, reducing installer fatigue during high-volume installations.
• Full 3 in. thread length along the entire 3 in. shank - maximum thread engagement throughout the fastener length means stronger holding power in structural wood connections.
• 0.655 in. head diameter - the wide head provides a large bearing surface that improves load transfer and helps meet structural requirements without washers in many applications.
• Meets 2018 and 2021 IRC and IBC code requirements - suitable for use in permitted construction projects and inspected wood-framing applications, reducing approval risk.
• Driver bit included - the package includes a driver bit so installers can get to work immediately without sourcing additional tooling.

Why This Product

• A genuine lag screw alternative that installs faster - no predrilling means fewer tool changes and steps per connection, making these screws a productivity advantage over traditional lag screws on ledger boards, timber framing, and structural connections.
• Built for harsh and corrosive environments - Type 316 stainless steel is the material of choice for coastal, marine-adjacent, and pressure-treated lumber applications where chlorides and moisture accelerate corrosion in lower-grade materials.
• Code-recognized for structural use - meeting both 2018 and 2021 IRC and IBC requirements means these fasteners can be specified with confidence in inspected residential and commercial wood-framing projects.
• Ready to drive right out of the package - the included 1/2 in. hex driver bit eliminates the need to locate compatible tooling before starting, streamlining the workflow for both professionals and contractors.

Specifications

• Brand: Simpson Strong-Tie
• Finish: Type 316 Stainless Steel
• Material: Type 316 Stainless Steel
• Length (in.): 3
• Shank Diameter (in.): 0.275
• Head Diameter (in.): 0.655
• Head Type: Hex Washer Head
• Drive Type: 1/2 in. Hex
• Thread Type: Box Threads
• Thread Length (in.): 3
• TPI: 7
• Point Type: Sharp Point
• Country of Origin: Taiwan

Available Pack Options

• SDWH27300SS-R10: 10 Pk - includes (1) driver bit
• SDWH27300SS-R100: 100 Pk - includes (1) driver bit

Frequently Asked Questions

Do these screws require predrilling before installation?

No. The sharp point on the SDWH TIMBER-HEX SS screw is designed to penetrate wood without predrilling in most applications, making installation faster and easier compared to traditional lag screws.

What makes Type 316 stainless steel suitable for outdoor and structural applications?

Type 316 stainless steel offers maximum corrosion protection, making these fasteners well-suited for exposed outdoor environments, coastal settings, and applications involving pressure-treated lumber where moisture and chemicals can degrade standard steel fasteners over time.

Are these screws code-compliant for structural wood-framing projects?

Yes. These fasteners meet 2018 and 2021 IRC and IBC code requirements for several common wood-framing applications, making them appropriate for use in permitted and inspected residential and commercial construction projects.

What drive tool is needed to install these screws?

These screws use a 1/2 in. hex drive. A compatible driver bit is included in the package so you can begin installation immediately without sourcing additional tooling.

Note: Product dimensions and/or thread length may differ from picture.