The Simpson Strong-Drive SDS Heavy-Duty Connector Screw from Simpson Strong-Tie is a 1/4 in.-diameter high-strength structural screw engineered for reliable performance in connector installations, wood-to-wood assemblies, and engineered wood applications. Featuring a corrosion-resistant double-barrier coating and a no-predrill Type-17 point, this hex head structural screw simplifies installation while delivering the holding strength required for demanding construction and framing projects. Whether fastening Simpson Strong-Tie connectors or securing engineered lumber, this heavy-duty screw is built to perform where structural integrity matters most.

Key Features

• Type-17 Point - enables easy driving with no predrilling required, saving time and reducing labor on connector and structural wood installations
• Double-Barrier Coating - provides corrosion resistance to protect fastener integrity in demanding environments and extend long-term service life
• 3/8 in. Hex Head Drive - compatible with standard hex drivers and low-speed drills, allowing fast, controlled installation without specialty tools
• Serrated Threads at 10 TPI - grip wood fibers aggressively for strong, reliable holding power in structural and connector applications
• 0.235 in. Shank Diameter with 2-3/4 in. Thread Length - optimized thread engagement delivers consistent pull-through resistance in both solid and engineered wood substrates
• 5 in. Overall Length - provides sufficient embedment depth for heavy-duty connector fastening and wood-to-wood structural connections
• Extensively Tested - has undergone rigorous application testing, giving builders and contractors confidence in code-compliant structural performance

Why This Product

• No predrilling is required thanks to the Type-17 point, which means faster installation and fewer steps when fastening connectors or assembling structural wood members on the job site.
• The double-barrier coating protects against corrosion over time, making this screw a sound choice for structural connections where fastener longevity and coating durability are critical.
• Serrated threads combined with a 10 TPI thread pattern bite firmly into wood and engineered lumber, reducing the risk of loosening and ensuring secure, lasting connections in high-load applications.
• Designed specifically for use with Simpson Strong-Tie connectors, this screw is a purpose-built solution that matches the engineering standards these connectors are tested to - removing guesswork from fastener selection.

Specifications

• Brand: Simpson Strong-Tie
• Shank Diameter (in.): 0.235
• Length (in.): 5
• Thread Length (in.): 2 3/4
• TPI: 10
• Head Type: Hex Head
• Drive Type: 3/8 in. Hex
• Thread Type: Serrated Threads
• Point Type: Type-17 Point
• Coating: Double-Barrier Coating
• Finish: Double-Barrier Coating

Available Pack Options

• SDS25500-R10: 10 Pk
• SDS25500-R25L: 25 Pk - includes (1) 3/8-in. hex-driver bit included
• SDS25500MB: 100 Pk
• SDS25500: 500 Pk

Approved Applications

• Fastening Simpson Strong-Tie Connectors

Install With

• A low-speed 1/2 in. drill with a 3/8 in. hex driver is the recommended tool for installation

Frequently Asked Questions

Does this screw require predrilling before installation?

No. The Type-17 point is specifically designed for easy driving without any predrilling, streamlining installation in both solid wood and engineered wood applications.

What tool is recommended for driving the SDS Heavy-Duty Connector Screw?

A low-speed 1/2 in. drill fitted with a 3/8 in. hex driver is the recommended installation tool, providing the controlled torque needed for proper seating without overdriving.

What type of coating does this screw have, and why does it matter?

This screw features a double-barrier coating that provides corrosion resistance, helping to protect the fastener's structural integrity and extend its service life in connector and structural wood applications.

Is this screw suitable for engineered wood products?

Yes. The Simpson Strong-Drive SDS Heavy-Duty Connector Screw has been extensively tested in wood-to-wood and engineered wood applications in addition to connector installations, making it appropriate for a range of structural building assemblies.

Note: The image displayed is a generic representation of the type of product. Product dimensions and/or thread length may differ from picture.