Simpson Strong-Drive SD Connector Screw - #10 x 2-1/2" Mechanically Galvanized is an engineered fastener from Simpson specifically designed to replace nails in Simpson Strong-Tie connectors - and it is the only screw approved for that application. With load ratings that exceed typical 10d and 16d common nails in single-fastener tests, this hex-head connector screw gives installers greater control, easier installation in tight spaces, and confidence that every fastened joint meets tested performance standards. The Class 55 mechanically galvanized coating makes it well-suited for both interior framing and most exterior structural connector applications.

Key Features

• Only approved screw for select Simpson Strong-Tie connectors - ensures your fastened connections meet the load ratings and code compliance requirements of Simpson's tested connector products, so there is no guesswork about approval.
• Single-fastener load values exceed typical 10d and 16d common nails - fewer fasteners can achieve the same or greater holding strength compared to nail-driven connections, which can reduce installation time on connector-heavy framing projects.
• Mechanically Galvanized, Class 55 coating - delivers corrosion resistance suitable for interior conditions and most exterior environments, extending the service life of the connection in exposed or outdoor framing applications.
• 1/4 in. hex head drive - compatible with standard hex driver bits and impact drivers, so installation is faster and more controlled than hand-nailing, especially in overhead or confined framing situations.
• Sharp point tip - starts without pre-drilling, driving cleanly into wood framing to reduce split risk and speed up connector installation.
• #10 screw size with 0.160 in. shank diameter - sized to fit the fastener holes in approved Simpson Strong-Tie connectors, delivering a snug, load-transferring fit without damaging connector flanges.
• Hex driver included - ready to use out of the box without needing to locate a separate bit, reducing setup time on the job site.

Why This Product

• For any project using approved Simpson Strong-Tie connectors, this is the only tested and load-rated screw alternative to nails - making it the correct choice when building inspectors or engineers require connector-specific fastener compliance.
• When using a hammer is inconvenient - such as in tight joist bays, overhead applications, or close-quarter framing - a hex-driven screw provides the same structural performance with far greater installer control.
• The Class 55 mechanically galvanized coating suits most exterior framing connector applications where corrosion resistance is required, without the premium cost of higher-grade coatings for standard outdoor structural use.
• The sharp point and 10 TPI thread profile allow this screw to drive efficiently into framing lumber through connector holes, reducing cam-out and installation fatigue compared to driving large common nails.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #10
• Length: 2-1/2 in.
• Shank Diameter: 0.160 in.
• Head Type: Hex Head
• Head Diameter: 0.370 in.
• Drive Type: 1/4 in. Hex
• Point Type: Sharp Point
• Thread Length: 1-1/8 in.
• TPI: 10
• Coating: Mechanically Galvanized, Class 55
• Country of Origin: United States

Available Pack Options

• SD10212R100-R: 100 Pk - includes Hex driver included
• SD10212R500: 500 Pk - includes Hex driver included
• SD10212MB: 2000 Pk - includes Hex driver included

Approved Applications

• Fastening Simpson Strong-Tie Connectors

Frequently Asked Questions

Can I use this screw in any Simpson Strong-Tie connector, or only specific ones?

The Strong-Drive SD Connector screw has been tested and approved for use in many popular Simpson Strong-Tie connector products, but not necessarily all of them. It is designed specifically to replace nails in the connectors where it has been tested and approved. Always verify that your specific connector model is listed as approved for SD screw use before substituting screws for nails.

How does the single-fastener load performance of this screw compare to common nails?

In tested applications, the single-fastener load values achieved by the SD screw exceed those of typical 10d common and 16d common nails. This means that in approved connector applications, the screw can deliver stronger individual fastener performance than the nails it is designed to replace.

Is this screw suitable for exterior or outdoor connector applications?

Yes. The Mechanically Galvanized Class 55 coating makes the SD screw appropriate for interior framing and most exterior conditions. If your project involves particularly aggressive environments, verify that Class 55 galvanization meets the corrosion-resistance requirements for that specific situation.

What drive tool do I need to install this screw?

This screw uses a 1/4 in. hex head drive, and a hex driver bit is included with the product. It can also be driven with any standard 1/4 in. hex-compatible drill driver or impact driver, making it compatible with common job-site power tools.