The Simpson Strong-Drive SDS Heavy-Duty Connector Screw (1/4 in. x 1-1/2 in.) by Simpson is a high-strength structural fastener engineered specifically for securing Simpson Strong-Tie connectors with speed, reliability, and long-term corrosion resistance. With a 0.235 in. shank diameter, serrated threads, and a self-starting Type-17 point, this connector screw drives fast and holds firm - eliminating the need for predrilling and reducing installation time on framing and structural connector applications. The double-barrier coating delivers durable protection against corrosion, making this screw a dependable choice in demanding job-site environments.

Key Features

• Type-17 Point - self-starting tip pierces wood without predrilling, speeding up installation and reducing labor on connector fastening projects
• Serrated Threads at 10 TPI - aggressive thread geometry grips wood fibers tightly, maximizing holding strength in heavy-duty connector installations
• 3/8 in. Hex Head Drive - compatible with standard hex driver bits, allowing fast installation with a low-speed 1/2 in. drill for consistent, controlled torque
• 1 in. Thread Length on a 1-1/2 in. Fastener - concentrated thread engagement in the base material delivers strong pull-through resistance where it matters most
• Double-Barrier Coating - two-layer corrosion protection resists moisture and oxidation, extending fastener life in structural and connector applications
• Hex Head Profile - low-profile hex head seats reliably against connector plates, ensuring a flush, secure fit across Simpson Strong-Tie hardware

Why This Product

• Designed specifically for fastening Simpson Strong-Tie connectors, this screw eliminates guesswork - you get a fastener that is dimensionally and mechanically matched to the hardware it secures
• The Type-17 point means no predrilling on the job site, which reduces steps in the installation process and keeps structural connector work moving efficiently
• The double-barrier coating provides two layers of corrosion defense, giving this screw durability in conditions where a single-coated fastener would be more vulnerable to moisture-related degradation
• The 3/8 in. hex drive pairs directly with a standard low-speed 1/2 in. drill setup, so installers can drive these screws without specialized tooling or adapters

Specifications

• Brand: Simpson Strong-Tie
• Length: 1-1/2 in.
• Shank Diameter: 0.235 in.
• Thread Length: 1 in.
• TPI: 10
• Thread Type: Serrated Threads
• Head Type: Hex Head
• Drive Type: 3/8 in. Hex
• Point Type: Type-17 Point
• Coating/Finish: Double-Barrier Coating

Available Pack Options

• SDS25112-R25: 25 Pk
• SDS25112MB: 300 Pk
• SDS25112: 1500 Pk

Approved Applications

• Fastening Simpson Strong-Tie Connectors

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 a self-starting tip that allows the screw to drive directly into wood without any predrilling, streamlining the installation process for connector fastening work.

What drive tool is recommended for installing this screw?

A low-speed 1/2 in. drill fitted with a 3/8 in. hex driver bit is the recommended installation tool. The hex head design ensures secure bit engagement and controlled driving torque.

What is the purpose of the double-barrier coating on this screw?

The double-barrier coating provides two layers of corrosion-resistant protection, helping the fastener withstand moisture exposure and oxidation in structural and connector installation environments.

What is the actual shank diameter of this screw?

The shank diameter is 0.235 in. The screw has a 1 in. thread length within its overall 1-1/2 in. length, with serrated threads at 10 TPI for strong mechanical grip in connector applications.

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.