Product Description
Simpson Strong-Tie SDCFC273938 - 0.390 x 39-3/8" Strong-Drive SDCFC TIMBER-CFC Screw (50-Pack)
The Simpson Strong-Tie SDCFC273938 is a heavy-duty structural fastener engineered for cross-laminated timber (CLT) construction, mass timber construction, and general interior applications. At 39-3/8" in length with a 0.390" overall diameter, this screw delivers exceptional holding power in demanding applications that require large-sized structural members. The yellow zinc coating is formulated exclusively for interior, dry-use environments, ensuring consistent performance wherever oversized structural connections are required.
Key Features
- Structural-Grade Fastener: Designed specifically for cross-laminated timber (CLT) and mass timber construction where large-sized structural members demand superior fastening performance.
- Extended Length: At 39-3/8" long with a 38" thread length, these screws achieve deep, secure engagement through thick timber assemblies.
- Yellow Zinc Coating: Corrosion-resistant yellow zinc finish suited for interior, dry applications.
- T50 6-Lobe Drive: The Torx-style T50 6-lobe drive system provides excellent driver engagement and reduces cam-out during installation.
- Cylinder Head Design: Low-profile cylinder head with a 0.525" head diameter seats cleanly against timber surfaces for a flush, secure connection.
- Wide Application Range: Suitable for beam reinforcement, wall-to-wall connections, floor-to-floor connections, support beams, butt joints, and splitting reinforcement.
Specifications
- Specification: Value
- Model Number: SDCFC273938
- Length: 39-3/8"
- Shank Diameter: 0.29 in.
- Head Diameter: 0.525 in.
- Thread Length: 38"
- Head Type: Cylinder Head
- Drive Type: T50 6-Lobe
- Coating / Material: Yellow Zinc
- Pack Quantity: 50 per pack
Approved Applications
The SDCFC273938 TIMBER-CFC screw is designed for use in the following applications:
- Cross-laminated timber (CLT) construction
- Mass timber construction
- General
Frequently Asked Questions
- What types of construction is the SDCFC273938 screw designed for?
- This screw is engineered specifically for cross-laminated timber (CLT) construction and mass timber construction, where large-sized structural members require superior fastening performance. It is also suitable for general interior applications including beam reinforcement, wall-to-wall connections, floor-to-floor connections, support beams, butt joints, and splitting prevention.
- Can this screw be used in outdoor or wet environments?
- No. The yellow zinc coating on this screw is formulated exclusively for interior, dry-use environments. It is not intended for exterior, wet, or high-moisture applications.
- What drive type does this screw require, and why does it matter?
- This screw uses a T50 6-lobe (Torx-style) drive system. This design provides excellent driver engagement and significantly reduces cam-out during installation, which is especially important when driving a screw of this length through thick timber assemblies.
- What are the key dimensions of this screw?
- Each screw has an overall length of 39-3/8", an overall diameter of 0.390", and a thread length of 38". The cylinder head has a diameter of 0.525", which seats cleanly against timber surfaces for a flush, secure connection. Each pack contains 50 screws.
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