Simpson Strong-Drive SD Connector Screw - #9 x 1-1/2" Mechanically Galvanized is a load-rated hex head fastener engineered by Simpson specifically to replace nails in Simpson Strong-Tie connectors - making it the only screw approved for that critical structural application. With a sharp point, 1/4 in. hex drive, and Class 55 mechanically galvanized coating, this connector screw delivers reliable performance in both interior and most exterior framing and connector installations where precision fastening matters.

Key Features

• Specifically designed and approved to replace nails in Simpson Strong-Tie connectors - the only screw tested and rated for this application, giving installers confidence that load values meet structural requirements
• Single-fastener load values exceed those of typical 10d common or 16d common nails - meaning fewer fasteners can achieve greater holding strength in connector applications
• Mechanically Galvanized, Class 55 coating - protects against corrosion in interior and most exterior conditions, including environments where moisture exposure is a concern
• 1/4 in. hex drive head - allows use with standard hex drivers for faster, more controlled installation compared to driving nails, particularly in tight spaces or overhead applications
• Sharp point tip - enables easy self-starting penetration into wood without pre-drilling, reducing installation time on the jobsite
• 8-1/2 TPI thread with 1-1/8 in. thread length - provides strong thread engagement in the connected wood members for secure, lasting fastening
• 1/4 in. hex drive with included hex driver - ensures you have the right bit on hand and eliminates cam-out during installation
• Made in the United States - consistent manufacturing standards support reliable, repeatable performance across connector installations

Why This Product

• The only screw approved for replacing nails in specific Simpson Strong-Tie connectors - if you are installing Simpson hardware, this screw is not a substitute or an approximation, it is the load-tested, code-compliant fastener designed for the job
• Outperforms common nails in single-fastener load values - where code or engineering plans call for 10d or 16d nails in connector holes, this screw can meet or exceed those values while offering the control and convenience of a screw drive
• Class 55 mechanically galvanized finish makes this screw suitable for most exterior conditions - ideal for deck framing, exterior joist hangers, post caps, and other outdoor connector applications where a nail gun may not be practical
• Hex driver included with purchase - no need to source a separate bit, allowing crews to get to work immediately on connector installations

Specifications

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

Available Pack Options

• SD9112R100: 100 Pk - includes Hex driver included
• SD9112R500: 500 Pk - includes Hex driver included
• SD9112MB: 3000 Pk - includes Hex driver included

Approved Applications

• Fastening Simpson Strong-Tie Connectors

Frequently Asked Questions

Can I use these screws in place of nails for any Simpson Strong-Tie connector?

The SD Connector screw is tested and approved for use in many popular Simpson Strong-Tie connectors, but it is specifically designed for applications where it is listed as an approved fastener. Always verify the connector's installation guide to confirm the SD screw is an approved fastener for that particular product before substituting it for nails.

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

The single-fastener load values achieved by the SD screw exceed those of typical 10d common or 16d common nails in approved connector applications, making it a structurally capable alternative where screws are preferred for ease of installation or precision.

Is the Class 55 mechanically galvanized coating suitable for outdoor use?

Yes. The mechanically galvanized, Class 55 coating makes the SD screw ideal for interior and most exterior conditions, providing corrosion resistance for exposed framing, deck connectors, and other outdoor fastening applications where moisture is present.

What drive tool do I need to install this screw?

This screw uses a 1/4 in. hex drive, and a hex driver is included with your purchase. A standard 1/4 in. hex driver bit used with any corded or cordless drill or impact driver is compatible with this fastener.