The Simpson Strong-Drive SDS Heavy-Duty Connector Screw 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. Designed by Simpson Strong-Tie, this heavy-duty fastener eliminates the need for predrilling, saving time and effort on the job site while delivering consistent, code-tested holding strength. The double-barrier coating provides corrosion resistance that holds up in demanding structural environments, making this screw a dependable choice for both professional contractors and serious builders.

Key Features

• Type-17 Point - cuts through wood fibers cleanly for easy driving with no predrilling required, reducing installation time and eliminating an extra tool step
• 3/8 in. Hex Drive Head - compatible with a standard 3/8 in. hex driver for fast, torque-efficient installation using widely available drill equipment
• Double-Barrier Coating - provides corrosion resistance to protect the screw's structural integrity in connector and wood applications exposed to moisture and the elements
• Serrated Threads - grip wood fibers aggressively for strong, secure pull-through resistance in structural connections
• 8 in. Length with 3-1/4 in. Thread Length - delivers deep thread engagement where it counts while the unthreaded shank draws connected members tight together
• 0.235 in. Shank Diameter - engineered for high shear and withdrawal strength in heavy-duty structural connector applications
• Extensively Tested - the SDS screw has been tested across a wide range of applications, giving builders confidence that the fastener meets performance standards for structural use

Why This Product

• No predrilling is required thanks to the Type-17 point, which means faster installations in Simpson Strong-Tie connector and wood-to-wood applications without sacrificing holding power
• The corrosion-resistant double-barrier coating is specifically developed to protect the screw in structural connector installations where long-term durability matters
• The hex head design gives installers positive driver engagement, reducing cam-out and making it practical to drive multiple screws efficiently with a low-speed drill and 3/8 in. hex driver
• Purpose-built for Simpson Strong-Tie connector installations and engineered wood assemblies, this screw is a tested, proven fastener solution for critical structural connections rather than a general-purpose substitute

Specifications

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

Available Pack Options

• SDS25800-R10: 10 Pk
• SDS25800-R50: 50 Pk
• SDS25800: 400 Pk

Approved Applications

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

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 with no predrilling required, simplifying the installation process in connector and wood applications.

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

A low-speed 1/2 in. drill equipped with a 3/8 in. hex driver is the recommended installation tool, which matches the screw's 3/8 in. hex head drive type.

What types of applications is this screw designed for?

This screw is designed for fastening Simpson Strong-Tie connectors, as well as wood-to-wood and engineered wood structural applications. It has been extensively tested across these installation types.

What corrosion protection does this screw have?

The SDS screw features a double-barrier coating that provides corrosion resistance, helping protect the fastener's structural integrity in connector installations and other demanding environments.

Note: The image displayed is a generic representation of the type of product. Product dimensions and/or thread length may differ from picture. Please see the item description above for specifications.