Simpson #9 x 2-1/2" Type 316 Stainless Steel SD Connector Screw by Simpson Strong-Tie is engineered specifically to replace nails in compatible Simpson Strong-Tie stainless-steel connectors, delivering load-rated performance in demanding structural and connector fastening applications. With a sharp point for easy penetration, a 1/4 in. hex drive for precise torque control, and Type 316 stainless steel construction for outstanding corrosion resistance, this screw is the reliable choice for severe-exposure environments where standard fasteners fall short.

Key Features

• Specifically designed to replace nails in Simpson Strong-Tie stainless-steel connectors - purpose-built for connector applications, it is load-tested and approved for use in many popular Simpson Strong-Tie products, giving you verified structural confidence.
• Single-fastener load values exceed those of typical 10d common nails - delivers greater holding strength per fastener, so you can achieve code-compliant connections with fewer fasteners and greater reliability.
• Type 316 stainless steel material and finish - provides excellent corrosion resistance appropriate for severe-exposure environments including coastal, marine, and chemically challenging outdoor conditions.
• 1/4 in. hex drive head with 0.370 in. head diameter - allows the use of a standard hex driver for controlled, convenient installation, especially in tight spaces where swinging a hammer is difficult or impractical.
• Sharp point tip - starts cleanly without pre-drilling, speeding up installation and reducing the chance of splitting in connector fastening work.
• Hex head configuration - provides a positive mechanical engagement with the driver, reducing cam-out and allowing consistent torque during installation in connector hardware.
• #9 screw size with 0.130 in. shank diameter and 8-1/2 TPI thread - thread geometry is optimized for structural connector fastening, balancing pull-through resistance and shear strength in each application.
• 1-1/4 in. thread length on a 2-1/2 in. overall length - thread engagement is concentrated where it matters most in the connected member, maximizing withdrawal and lateral load performance.
• Hex driver included with purchase - ready-to-install straight out of the pack, so there is no need to source a separate bit before getting to work.

Why This Product

• The only screw approved for certain Simpson Strong-Tie stainless-steel connector applications - when the connector manufacturer specifies this fastener for load-rated performance, substituting a generic screw is not an option. This screw meets the tested and approved criteria for those connectors.
• Outperforms 10d common nails on a per-fastener basis - in applications where screw installation is more practical than nailing, you are not sacrificing structural capacity - you are gaining it, based on tested single-fastener load values.
• Built for severe-exposure environments - Type 316 stainless steel handles the corrosive conditions found in coastal construction, treated lumber contact, and wet or marine environments where standard zinc-coated fasteners would degrade prematurely.
• Convenience without compromise - the 1/4 in. hex drive design allows you to use a drill or impact driver for faster, more controlled installation than hand-nailing, particularly useful in overhead work or confined framing spaces.

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: 1-1/4 in.
• TPI: 8-1/2
• Head Type: Hex Head
• Drive Type: 1/4 in. Hex
• Point Type: Sharp Point
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Country of Origin: Taiwan

Available Pack Options

• SD9212SS-R100: 100 Pk - includes Hex driver included
• SD9212SS-R500: 500 Pk - includes Hex driver included
• SD9212SSMB: 2000 Pk - includes Hex driver included

Approved Applications

• Fastening Simpson Strong-Tie Connectors

Frequently Asked Questions

Can this screw be used as a general-purpose structural screw in place of any nail?

No - this screw is specifically designed to replace nails in certain Simpson Strong-Tie stainless-steel connectors. It has been tested and approved for use in many popular Simpson Strong-Tie products, and its load ratings are specific to those connector applications. Always verify the connector's fastener requirements before substituting.

Why is Type 316 stainless steel important for connector fastening in outdoor settings?

Type 316 stainless steel provides excellent corrosion resistance appropriate for severe-exposure environments. This makes it well-suited for coastal construction, marine settings, and applications involving treated lumber or prolonged moisture exposure where lesser materials would corrode and lose structural integrity over time.

How does the single-fastener load capacity of this screw compare to a 10d common nail?

The single-fastener load values achieved by this SD SS screw exceed those of typical 10d common nails. This means that in applications where the screw is approved, you achieve equal or greater load capacity per fastener compared to nailing.

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. You can use any standard 1/4 in. hex drill driver or impact driver, making installation faster and more controlled than hand-nailing - especially useful in tight spaces or overhead framing applications.

Note: Product dimensions and/or thread length may differ from picture.