Simpson Strong-Drive TB Wood-to-Steel Screw, #14 x 3" is a structural fastener engineered by Simpson Strong-Tie for securely attaching wood members to steel framing and metal substrates. Built to handle demanding wood-to-metal fastening tasks, this screw delivers consistent, code-quality performance in dry, interior, or noncorrosive environments. The black phosphate finish gives the fastener a clean, low-profile appearance while complementing interior steel framing applications where a polished look matters.

Key Features

• Black phosphate coating - provides a uniform dark finish suited for dry, interior, and noncorrosive environments, keeping the fastener protected through installation
• Flat head with nibs for easy countersinking - the nibs score into the wood as the screw is driven, allowing the head to sit flush without pre-drilling a countersink, saving time on the job
• T30 6-Lobe drive type - delivers superior torque transfer and reduces cam-out compared to square drives, resulting in faster, more reliable driving even under high load
• #4 drill point with wings - the self-drilling point penetrates steel without pre-drilling, while the wings clear the wood fiber before engaging the steel, preventing wood binding and splitting
• Tapping threads at 14 TPI - thread directly into steel up to 1/4 in. thick without a tapped hole, simplifying the fastening process and reducing labor
• 0.198 in. shank diameter with a 0.460 in. flat head - the heavy shank handles the shear loads common in structural wood-to-steel connections, while the wide head distributes clamping force across the wood face
• Maximum grip length of 2.24 in. - ensures solid clamping engagement between the wood and steel substrate for a tight, structural connection
• Driver bit included - eliminates the need to source a separate T30 bit, so you can get straight to work right out of the package

Why This Product

• Engineered specifically for wood-to-steel fastening up to 1/4 in. steel thickness - this screw is purpose-built for the application, not a general-purpose fastener adapted to the task, meaning the geometry, thread form, and point are optimized for reliable performance in metal stud and steel framing connections
• Self-drilling point with wings eliminates pre-drilling steps - the #4 drill point bores through steel while the wings clear wood debris before the tapping threads engage, streamlining the installation process and reducing the number of tools needed on the job
• T30 6-Lobe drive resists cam-out under torque - compared to a square drive, the 6-lobe interface maintains better contact between the bit and fastener head, reducing stripped heads and wasted fasteners during high-volume installation
• Designed and tested by Simpson Strong-Tie for structural applications - these fasteners are not utility-grade screws; they are structural fasteners extensively tested to meet the demands of wood-to-metal assemblies, giving builders and contractors confidence in the connection

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #14
• Length (in.): 3
• Head Type: Flat Head
• Head Diameter (in.): 0.460
• Shank Diameter (in.): 0.198
• Drive Type: T30 6-Lobe
• Thread Type: Tapping Threads
• TPI: 14
• Max. Grip Length (in.): 2.24
• Point Type: Drill Point with Wings
• Point Size: 4
• Coating/Finish: Black Phosphate Coating
• Approx. Count Per Lb: 39
• Country of Origin: Taiwan

Available Pack Options

• TBP1475R50: 50 Pk - includes Driver bit included
• TBP1475R1000: 1000 Pk - includes Driver bit included

Approved Applications

• Fastening wood members to steel framing or hot-rolled steel up to 1/4 in. thick
• Dry, interior structural assemblies where noncorrosive conditions are maintained
• Wood-to-metal connections in framing, blocking, and structural panel attachment to steel

Frequently Asked Questions

What is the maximum steel thickness this screw is rated for?

The Simpson Strong-Drive TB Wood-to-Steel screw is designed for steel substrates up to 1/4 in. thick. Using it in applications exceeding this recommended thickness is outside the intended use and may affect connection performance.

Can this screw be used in outdoor or corrosive environments?

No. The black phosphate coating on this screw is intended for dry, interior, or noncorrosive environments only. It is not rated for exterior, wet, or chemically aggressive applications. For outdoor or corrosive environments, a different coating or fastener type would be required.

Does this screw require pre-drilling through the steel?

No. The #4 drill point with wings is a self-drilling design that penetrates steel without requiring a pilot hole. The wings clear wood material before the tapping threads engage the steel, making the installation process faster and requiring fewer tools.

What driver bit does this screw use?

This screw uses a T30 6-Lobe (Torx-style) drive. A compatible driver bit is included with the product, so no separate bit purchase is needed to begin installation.