Simpson Strong-Tie SDCFC273112 - 0.390 x 31-1/2" Strong-Drive SDCFC TIMBER-CFC Screw (50-Pack)

The Simpson Strong-Tie SDCFC TIMBER-CFC Screw (Model SDCFC273112) is a heavy-duty structural fastener engineered for cross-laminated timber (CLT) construction, mass timber construction, and general interior applications. At 31-1/2" in length with a robust 0.390" overall diameter, this screw delivers the extra strength required for demanding applications involving large-sized structural members. The yellow zinc coating is formulated specifically for interior, dry-use environments, ensuring lasting performance where conditions remain controlled.

Key Features

• Structural Performance: Designed for cross-laminated timber (CLT) and mass timber construction requiring high-capacity fastening
• Yellow-Zinc Coating: Corrosion-resistant coating suitable for interior, dry applications
• Cylinder Head Design: Low-profile cylinder head with a 0.525" head diameter for a secure, flush-bearing surface
• T50 6-Lobe Drive: Torx-style 6-lobe drive (T50) provides excellent torque transfer and reduces cam-out during installation
• Extended Thread Length: 30-1/8" thread length maximizes thread engagement deep into structural members
• Versatile Applications: Ideal for beam reinforcement, butt joints, wall-to-wall, floor-to-floor, support beams, and splitting reinforcement
• Large-Member Fastening: Extra-long design provides the clamping force needed for oversized structural lumber assemblies

Specifications

• Model Number (MPN): SDCFC273112
• Brand: Simpson Strong-Tie
• Series: Strong-Drive SDCFC TIMBER-CFC
• Length: 31-1/2"
• Shank Diameter: 0.29 in.
• Head Diameter: 0.525 in.
• Thread Length: 30-1/8 in.
• Head Type: Cylinder Head
• Drive Type: T50 6-Lobe
• Coating / Material: Yellow-Zinc Coated
• Interior/Exterior Use: Interior, Dry Applications Only
• Pack Size: 50-Pack

Approved Applications

These structural screws are suited for the following construction applications:

• Cross-laminated timber (CLT) construction
• Mass timber construction
• General interior structural applications
• Beam reinforcement
• Wall-to-wall connections
• Floor-to-floor connections
• Support beams
• Butt joints
• Splitting reinforcement

What's Included

• 50 x Simpson Strong-Tie SDCFC273112 Strong-Drive SDCFC TIMBER-CFC Screws (0.390 x 31-1/2", Yellow-Zinc Coated)

Frequently Asked Questions

What types of construction is the SDCFC273112 screw designed for?

This screw is engineered specifically for cross-laminated timber (CLT) construction, mass timber construction, and general interior applications. It is well suited for beam reinforcement, butt joints, wall-to-wall connections, floor-to-floor connections, support beams, and splitting reinforcement.

What drive type and size does this screw use?

The SDCFC273112 uses a T50 6-lobe (Torx-style) drive. This design provides excellent torque transfer and helps reduce cam-out during installation, making it a reliable choice for heavy-duty structural fastening.

Is this screw suitable for outdoor or wet environments?

No. The yellow zinc coating on this screw is formulated specifically for interior, dry-use environments. It is not intended for outdoor, wet, or high-moisture applications where more corrosion-resistant coatings would be required.

What are the key dimensional specs of this screw?

The screw measures 31-1/2" in length with an overall diameter of 0.390". It features a low-profile cylinder head with a 0.525" head diameter and a thread length of 30-1/8", which maximizes thread engagement deep into large structural members.