The Simpson Strong-Drive TF Wood-to-Steel Screw is a #14 x 3 in. load-rated structural fastener from Simpson Strong-Tie, engineered and extensively tested to meet the demands of the most challenging wood-to-metal fastening applications. Its #5 drill point with wings bores cleanly through the wood member before engaging and self-drilling into steel, while the flat head with nibs countersinks flush without fuss - delivering a clean, high-strength connection with no predrilling required. Straight collation makes this screw fully compatible with Simpson Strong-Tie Quik Drive auto-feed screw driving systems, making it a natural fit for high-volume jobs such as truck beds and trailer flooring.

Key Features

• T30 6-lobe recessed drive - provides secure bit engagement and longer driver bit life, reducing cam-out and bit changes on the job; a T30 driver bit is included
• #5 drill point with wings - bores through the wood member first before engaging the steel, eliminating the need for predrilling and speeding up installation
• Flat head with nibs - countersinks easily and flush into the wood surface while delivering excellent pull-through resistance for a strong, finished connection
• Self-tapping threads - cut directly into the steel member for a secure, reliable mechanical attachment without a pilot hole
• Black phosphate coating - suited for dry, low-corrosion interior environments where a durable, consistent finish is needed
• Straight collation - compatible with Simpson Strong-Tie Quik Drive auto-feed screw driving systems, specifically the PROHSD75 and PROHSD75M attachments, for fast and consistent production-rate installation
• 750-count packaging - provides enough fasteners for large structural or flooring projects without frequent restocking

Why This Product

• No predrilling, no extra steps - the #5 drill point with wings handles wood penetration automatically before transitioning to self-tapping engagement in steel up to 15/32 in. thick, saving significant time on wood-to-steel framing and decking work
• Built for high-speed production work - straight collation pairs directly with Simpson Strong-Tie Quik Drive auto-feed attachments, making this screw the right choice for repetitive fastening tasks like trailer flooring and truck bed installations where speed and consistency matter
• Engineered for structural confidence - load-rated and extensively tested by Simpson Strong-Tie, these fasteners are designed to perform in demanding structural wood-to-metal connections, not just general-purpose assembly
• Complete out-of-the-box - every box includes a T30 6-lobe driver bit, so the right tooling is on hand from the first fastener driven; replacement bits are available separately under model BITTX30

Specifications

• Model Number (MPN): TFP1475S
• Brand: Simpson Strong-Tie
• Screw Size: #14
• Length: 3 in.
• Head Type: Flat Head
• Head Diameter: 0.460 in.
• Drive Type: T30 6-Lobe
• Thread Type: Tapping Threads
• TPI (Threads Per Inch): 14
• Point Type: Drill Point with Wings
• Point Size: #5
• Collation Type: Straight
• Coating / Finish: Black Phosphate
• Maximum Steel Thickness: 15/32 in.
• Packaging Quantity: 750

Approved Applications

• Wood-to-Steel Fastening

Frequently Asked Questions

What is the maximum steel thickness this screw can drill into?

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 #5 drill point with wings clears the wood member first before engaging and self-drilling into the steel, so no predrilling is required.

Is this screw compatible with auto-feed screw driving systems?

Yes. The TFP1475S features straight collation, making it fully compatible with Simpson Strong-Tie Quik Drive auto-feed screw driving systems. Specifically, it installs with the Simpson Strong-Tie Quik Drive PROHSD75 and PROHSD75M attachments.

What drive type does this screw use, and is a driver bit included?

This screw uses a T30 6-lobe recessed drive, which provides secure driving engagement and longer bit life. A T30 6-lobe driver bit is included with every 750-count box. If a replacement bit is needed, the compatible replacement bit model is BITTX30.

Is this screw suitable for outdoor or high-moisture environments?

No. The TFP1475S has a black phosphate coating, which is intended for dry, low-corrosion applications only. It is not recommended for outdoor, high-humidity, or corrosive environments where a more protective coating would be required.