The Simpson Strong-Drive TF Wood-to-Steel Screw (#14 x 3") is a load-rated structural fastener engineered and extensively tested to meet the demands of wood-to-metal construction and heavy-duty fastening applications. Designed to bore cleanly through wood and into steel up to 15/32-in. thick, this black phosphate coated screw delivers reliable pull-through resistance and secure tapping engagement in steel - making it a trusted choice for structural wood-to-steel connections, truck bed flooring, and trailer decking installations.

Key Features

• Flat head with nibs - countersinks easily into wood for a flush, professional finish while providing excellent pull-through resistance in load-bearing assemblies
• #5 drill point with wings - bores through the wood member cleanly before engaging and drilling into the steel, eliminating the need for pre-drilling and reducing installation time
• T30 6-lobe drive recess - provides a secure, cam-out-resistant interface between driver bit and fastener, giving installers confident torque transfer during driving
• Self-tapping threads (14 TPI tapping threads) - cut directly into steel without requiring a pilot hole, creating a strong mechanical bond in steel members up to 15/32-in. thick
• Black phosphate coating - provides corrosion resistance suited to structural interior applications and pairs with a dark finish that blends discreetly into wood surfaces
• 3-in. (75 mm) length with 1.94-in. max grip length - sized to deliver adequate thread engagement into steel while spanning typical wood-to-steel structural connections
• T30 driver bit included - the matching 6-lobe bit is included so you can get to work immediately without sourcing additional tooling

Why This Product

• Engineered specifically for wood-to-steel fastening - the #5 drill point with wings and self-tapping threads work together so the screw transitions from wood to steel in a single pass, saving time on structural framing and decking projects
• Load-rated and extensively tested by Simpson Strong-Tie - this screw is designed for structural applications where fastener performance is critical, not just general-purpose assembly
• Penetrates steel up to 15/32-in. thick without pre-drilling - reducing steps on the job site when securing wood decking to steel framing in truck beds, trailer floors, or metal-framed structures
• The flat head with nibs countersinks flush into the wood surface - delivering a clean, snag-free finish that matters in high-traffic applications like truck beds and trailer flooring where surface smoothness is a functional requirement

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #14
• Length (in.): 3
• Head Type: Flat Head
• Head Diameter (in.): 0.460
• Drive Type: T30 6-Lobe
• Thread Type: Tapping Threads
• TPI: 14
• Max. Grip Length (in.): 1.94
• Point Type: Drill Point with Wings
• Point Size: 5
• Coating: Black Phosphate Coating
• Color: Black
• Country of Origin: Taiwan

Available Pack Options

• TFP1475R50: 50 Pk - includes T30 6-lobe driver bit included
• TFP1475R1000: 1000 Pk - includes T30 6-lobe driver bit included

Approved Applications

• Fastening Wood-to-Steel
• Truck Beds / Trailer Flooring

Frequently Asked Questions

What is the maximum steel thickness this screw can penetrate?

The Simpson Strong-Drive TF Wood-to-Steel screw is designed to bore through wood and into steel up to 15/32-in. thick. The recommended maximum steel thickness range is 1/4-in. to 15/32-in. for proper engagement of the self-tapping threads.

Do I need to pre-drill before installing this screw?

No. The #5 drill point with wings bores through the wood member on its own, then engages and drills directly into the steel member. The self-tapping threads secure the connection without requiring a pilot hole in either the wood or steel.

What driver bit does this screw require?

This screw uses a T30 6-lobe (Torx-style) driver. A matching T30 6-lobe driver bit is included in the box so you can begin installation right away. Replacement bits are referenced in the installation guidelines (model BIT30T-S2-R1).

Is this screw suitable for outdoor or exposed applications?

The black phosphate coating on this screw is designed for structural interior applications such as wood-to-steel framing, truck beds, and trailer flooring. For highly corrosive or prolonged outdoor-exposed environments, evaluate whether a coating rated for exterior use is more appropriate for your specific conditions.