Simpson Strong-Drive TB Wood-to-Steel Screw, #14 x 2-3/8", Black Phosphate is a structural fastener engineered and extensively tested by Simpson Strong-Tie for demanding wood-to-metal connections. Designed specifically for fastening wood framing, nailers, and ledgers to steel members up to 1/4 in. thick, this screw delivers the holding power and precision fit that structural applications require. The black phosphate finish and tapping thread design make it a go-to choice for interior, dry, and noncorrosive environments - including truck beds and trailer flooring. Whether you are securing wall nailers to steel studs or attaching wood ledgers to steel frames, this screw is purpose-built for the job.

Key Features

• Flat head with nibs - allows for easy countersinking into wood so the fastener sits flush without additional prep work, saving installation time.
• T30 6-Lobe (Torx) drive - delivers superior torque transfer and reduces cam-out compared to square or Phillips drives, giving installers a more controlled and efficient drive experience.
• #4 drill point with wings - the drill point self-starts through wood and pierces steel without pre-drilling, while the wings ream out the wood for a clean, low-resistance entry.
• Tapping threads at 14 TPI - threads are designed to tap directly into steel, creating a secure mechanical bite in the metal substrate for a strong, lasting connection.
• Black phosphate coating - provides a surface treatment suited for dry and interior applications, and the dark finish reduces glare during installation in bright work environments.
• 0.198 in. shank diameter with 1.65 in. max grip length - the robust shank handles structural shear loads while the grip length accommodates a range of wood member thicknesses up to the recommended steel thickness of 1/4 in.
• Driver bit included - a matching T30 driver bit ships with the product, so installers can get started immediately without sourcing a separate bit.

Why This Product

• Engineered for wood-to-steel structural connections - unlike general-purpose screws, the TB screw is specifically tested and rated for fastening wood to steel up to 1/4 in. thick, making it appropriate for nailers, ledgers, truck beds, and trailer flooring where structural integrity matters.
• Eliminates pre-drilling in most applications - the #4 drill point with wings bores through wood and starts in steel on contact, reducing labor steps and keeping the workflow moving on steel-framing projects.
• Designed to be driven without cam-out - the T30 6-Lobe drive geometry maintains positive engagement under high torque, reducing stripped heads and wasted fasteners during high-volume installation.
• All-in-one convenience - the included driver bit means a compatible tool is always at hand, reducing jobsite delays from missing accessories.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #14
• Length: 2-3/8 in.
• Head Type: Flat Head
• Head Diameter: 0.460 in.
• Shank Diameter: 0.198 in.
• Drive Type: T30 6-Lobe
• Thread Type: Tapping Threads
• TPI: 14
• Max. Grip Length: 1.65 in.
• Point Type: Drill Point with Wings
• Point Size: 4
• Coating/Finish: Black Phosphate Coating
• Approx. Count Per Lb: 43
• Country of Origin: Taiwan

Available Pack Options

• TBP1460R50: 50 Pk - includes Driver bit included
• TBP1460R1000: 1000 Pk - includes Driver bit included

Approved Applications

• Fastening Wood-to-Steel - Nailers and Ledgers
• Fastening Wood-to-Steel
• Truck Beds / Trailer Flooring

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 fastening wood to steel with a maximum recommended steel thickness of up to 1/4 in.

What drive tool is required to install this screw?

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

Is this screw suitable for outdoor or wet environments?

No. The black phosphate coating on this screw is designed for use in dry, interior, or noncorrosive environments only. It is not recommended for exterior, pressure-treated lumber, or high-moisture applications.

Does this screw require pre-drilling through the wood or steel?

No pre-drilling is required. The #4 drill point with wings is engineered to self-start through wood and penetrate steel directly, streamlining installation in wood-to-steel framing applications such as nailers, ledgers, and truck bed or trailer flooring projects.