Product Description
Simpson Strong-Tie 0.390 x 19-5/8" Strong-Drive SDCFC TIMBER-CFC Screw, 50-Pack is a heavy-duty structural fastener from Simpson Strong-Tie engineered for cross-laminated timber (CLT) construction, mass timber construction, and general interior applications. With its oversized length and robust cylinder head design, this screw delivers extra strength for demanding applications requiring large-sized structural members.
Key Features
- Structural fastener specifically designed for cross-laminated timber (CLT) and mass timber construction
- Yellow zinc coating formulated for interior, dry applications
- Cylinder head profile with T50 6-Lobe drive for secure, high-torque installation
- Extra-long 19-5/8" length provides superior holding power in large structural members
- Generous 18-3/8" thread length maximizes engagement and pull-through resistance
- 0.525" head diameter for broad bearing surface and reduced countersinking
- 0.29" shank diameter balanced for structural integrity and ease of driving
Specifications
- Model Number: SDCFC271958
- Brand: Simpson Strong-Tie
- Series: Strong-Drive SDCFC TIMBER-CFC
- Length: 19-5/8"
- Shank Diameter: 0.29 in.
- Head Diameter: 0.525 in.
- Thread Length: 18-3/8 in.
- Head Type: Cylinder Head
- Drive Type: T50 6-Lobe
- Coating/Material: Yellow-Zinc Coated
- Pack Size: 50
Approved Applications
- Cross-laminated timber (CLT) construction
- Mass timber construction
- General interior 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 Strong-Drive SDCFC TIMBER-CFC Screws (0.390 x 19-5/8")
Frequently Asked Questions
- What type of drive does the SDCFC271958 screw require?
- The SDCFC271958 uses a T50 6-Lobe drive. A T50 driver bit is required for proper installation to ensure full torque transfer without cam-out.
- Is the yellow zinc coating suitable for outdoor or high-moisture environments?
- No. The yellow zinc coating on the SDCFC271958 is intended for interior, dry applications only. It is not rated for exterior, wet, or corrosive environments.
- What is the thread length on this screw, and why does it matter?
- The SDCFC271958 features a thread length of 18-3/8". A longer thread engagement in mass timber and CLT members significantly increases withdrawal resistance, which is critical in structural connections such as beam reinforcement, butt joints, and wall-to-wall assemblies.
- How many screws are included in one package of SDCFC271958?
- Each package contains 50 screws, making it practical for professional structural timber projects requiring multiple fasteners per connection point.
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