Simpson Strong-Drive SDS Heavy-Duty Connector Screw - 1/4 in. x 6 in. by Simpson Strong-Tie is a high-strength structural fastener engineered for demanding connector installations, wood-to-wood assemblies, and engineered wood applications. The 1/4 in. diameter design with serrated threads and a corrosion-resistant double-barrier coating delivers reliable, long-lasting performance in structural framing projects where strength and ease of installation are both priorities. With no predrilling required, this heavy-duty connector screw saves time on the job site while maintaining the structural integrity required for load-bearing connections.

Key Features

• Type-17 Point - enables easy driving with no predrilling required, reducing installation time and eliminating the need for a separate drill step on structural connections
• Double-Barrier Coating - provides corrosion resistance that helps extend the service life of the fastener in demanding structural and outdoor applications
• 3/8 in. Hex Head Drive - compatible with standard hex driver bits for fast, consistent installation using common jobsite tools
• Serrated Threads at 10 TPI - grip into wood and engineered lumber securely, reducing the chance of fastener back-out once driven
• 3-1/4 in. Thread Length - delivers substantial thread engagement into the receiving material for strong, dependable pull-out resistance in structural connections
• 0.235 in. Shank Diameter - high-strength shank cross-section supports the load transfer demands of heavy-duty connector applications
• Extensively tested in multiple applications - backed by rigorous testing for use with Simpson Strong-Tie connectors, wood-to-wood, and engineered wood assemblies, giving installers confidence in structural performance

Why This Product

• No predrilling is needed thanks to the Type-17 point - ideal for contractors and builders who need to move quickly through structural connector installations without adding a separate boring step
• The double-barrier coating makes this screw a practical choice for structural applications where moisture exposure and long-term corrosion resistance matter
• Designed and tested specifically for Simpson Strong-Tie connector installations, this screw is a compatible, confidence-inspiring fastener choice when working with Simpson framing hardware
• The serrated thread design combined with a 10 TPI pitch and 3-1/4 in. thread engagement length ensures solid holding power in both solid lumber and engineered wood products

Specifications

• Brand: Simpson Strong-Tie
• Length: 6 in.
• Shank Diameter: 0.235 in.
• Thread Length: 3-1/4 in.
• Thread Type: Serrated Threads
• TPI: 10
• Head Type: Hex Head
• Drive Type: 3/8 in. Hex
• Point Type: Type-17 Point
• Coating/Finish: Double-Barrier Coating

Available Pack Options

• SDS25600-R10: 10 Pk
• SDS25600MB: 100 Pk
• SDS25600: 600 Pk

Approved Applications

• Fastening Simpson Strong-Tie Connectors
• Wood-to-wood structural connections
• Engineered wood product assemblies

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 to enable easy driving without any predrilling, making installation faster and more straightforward in connector and wood-to-wood applications.

What tool is recommended for driving this screw?

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

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 protect the fastener's structural integrity over time in demanding installation environments.

Is this screw suitable for engineered wood products?

Yes. The Simpson Strong-Drive SDS Heavy-Duty Connector Screw has been extensively tested for use in wood-to-wood connections as well as engineered wood applications, in addition to fastening Simpson Strong-Tie connectors.

Note: The image displayed is a generic representation of the type of product. Product dimensions and/or thread length may differ from the picture. Please refer to the specifications listed above for exact product details.