Simpson Strong-Drive SD Connector Screw, #9 x 2-1/2 in., Mechanically Galvanized by Simpson is the only screw tested and approved to replace nails in certain Simpson Strong-Tie connectors - making it the go-to fastener for installers who need load-rated performance in structural connector applications. Featuring a 1/4 in. hex head for fast, controlled driving, this sharp-point connector screw delivers single-fastener load values that exceed those of typical 10d common or 16d common nails, giving you stronger connections with greater installation convenience. The Class 55 mechanically galvanized coating protects against corrosion in interior and most exterior environments, including applications where moisture exposure is a concern.

Key Features

• Only screw approved for use in certain Simpson Strong-Tie connectors - ensures code-compliant, load-rated installations when replacing nails in structural connector applications
• Single-fastener load values exceed typical 10d common and 16d common nails - means fewer fasteners can achieve equivalent or greater holding strength, improving efficiency on the job
• Mechanically Galvanized, Class 55 coating - resists corrosion in interior and most exterior conditions, extending fastener life in exposed or moisture-prone environments
• 1/4 in. hex drive head (0.370 in. head diameter) - works with standard hex drivers for consistent torque and reduced cam-out during installation
• Sharp point tip - starts cleanly without pre-drilling, reducing installation time when fastening connectors to lumber
• #9 shank diameter (0.130 in.) with 8-1/2 TPI and 1-1/8 in. thread length - engineered thread geometry optimized for pull-through resistance in structural connector fastening
• Made in the United States - consistent manufacturing quality you can rely on for structural fastening applications
• Hex driver included - ready to use out of the box, eliminating the need to source a separate bit before starting work

Why This Product

• When a hammer is inconvenient or when precise fastener placement is critical, this screw gives installers a controlled, driver-based alternative to nailing into Simpson Strong-Tie connectors - without sacrificing load capacity
• The load-rated, tested-and-approved designation means this screw is not a generic substitute - it has been validated for use in many popular Simpson Strong-Tie products, supporting confidence in structural integrity
• The Class 55 mechanically galvanized coating makes this screw suitable for both interior framing and most exterior connector installations, reducing the need to stock separate fasteners for different environments
• Exceeding the pull-through performance of common 10d and 16d nails in a #9 screw profile means you get high-strength connections from a fastener that installs faster and with greater accuracy than hand-nailing

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #9
• Length: 2-1/2 in.
• Shank Diameter: 0.130 in.
• Head Diameter: 0.370 in.
• Thread Length: 1-1/8 in.
• TPI: 8-1/2
• Head Type: Hex Head
• Drive Type: 1/4 in. Hex
• Point Type: Sharp Point
• Coating: Mechanically Galvanized, Class 55
• Country of Origin: United States

Available Pack Options

• SD9212R100-R: 100 Pk - includes Hex driver included
• SD9212R500: 500 Pk - includes Hex driver included
• SD9212MB: 2000 Pk - includes Hex driver included

Approved Applications

• Fastening Simpson Strong-Tie Connectors

Frequently Asked Questions

Can this screw be used in exterior structural connector applications?

Yes. The Mechanically Galvanized, Class 55 coating is designed to protect against corrosion in interior and most exterior conditions, making this screw suitable for a wide range of connector fastening environments where moisture exposure may occur.

What nail does this screw replace in Simpson Strong-Tie connectors?

The #9 SD screw is designed to replace 10d and 16d common nails in certain Simpson Strong-Tie connectors. It is the only screw approved for that specific application, and its single-fastener load values exceed those of typical 10d common or 16d common nails.

What drive tool does this screw require?

This screw uses a 1/4 in. hex drive. A hex driver is included, so no separate bit is needed to get started.

Is this screw tested and approved for use in Simpson Strong-Tie products?

Yes. The Strong-Drive SD Connector screw has been tested and approved for use in many popular Simpson Strong-Tie products. It is specifically engineered for connector fastening applications and carries load-rated values for those uses.