The Simpson Strong-Tie Strong-Drive TF Wood-to-Steel Screw (TFP1475S) is a #14 x 3-inch (75 mm) load-rated structural fastener engineered and extensively tested to meet the demands of the most challenging wood-to-metal applications. Designed to bore through wood and into steel up to 15/32 in. thick, this screw features a flat head with nibs for flush, effortless countersinking and outstanding pull-through resistance. Its #5 drill point with wings clears the wood member before engaging and self-drilling into the steel, eliminating the need for predrilling entirely. The black phosphate finish is suited for dry, low-corrosion environments, and the straight collation is fully compatible with Simpson Strong-Tie Quik Drive auto-feed screw driving systems for high-speed, high-volume installation. Sold in a 750-count box with a T30 6-lobe driver bit included.

Key Features

• 6-Lobe Recessed Drive (T30): Delivers secure driving engagement and longer bit life; T30 6-lobe driver bit included with every box (replacement bit model BITTX30).
• #5 Drill Point with Wings: Bores cleanly through the wood member before engaging the steel, ensuring precise, controlled penetration without pre-drilling.
• Flat Head with Nibs: Provides easy, flush countersinking into wood and excellent pull-through resistance for a clean, professional finish.
• Self-Tapping Threads: Securely fasten into steel members without the need for tapped holes or pilot holes, saving time on the job.
• No Predrilling Required: The combination of the winged drill point and self-tapping threads allows direct installation into wood and steel in a single step.
• Straight Collation: Compatible with Quik Drive auto-feed screw driving systems for fast, efficient installation on demanding projects.
• Black Phosphate Coating: Intended for dry, low-corrosion interior applications.
• 750-Count Quantity: Packaged in bulk for high-volume, professional use.

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
• Country of Origin: Taiwan

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.