Product Description
The Simpson Strong-Tie Strong-Drive SDCFC TIMBER-CFC Screw is a heavy-duty structural fastener engineered for demanding large-member wood construction applications. At 0.390 in. diameter and 23 5/8 in. length, this long timber screw delivers exceptional withdrawal resistance in mass timber, glulam, cross-laminated timber, and multi-ply engineered wood assemblies. The fully threaded shank, SawTooth point, and deep T50 6-lobe drive recess combine to make installation fast and reliable - without predrilling in most applications. The black e-coat electrocoating finish offers both a clean aesthetic and durable corrosion resistance suited to interior dry-service conditions. Each box contains 50 screws plus one included driver bit, making this an efficient choice for structural timber framing and beam reinforcement projects.
Key Features
- Compact cylinder head design - countersinks flush for a clean exposed finish or a fully concealed installation, depending on the application
- Heavy-duty, fully threaded shank (0.290 in. shank diameter, 22 5/8 in. thread length) - maximizes withdrawal resistance along the entire fastener length for superior holding power in large timber members
- SawTooth point - enables fast starts and easy driving while reducing installation torque, eliminating the need for predrilling in most applications and saving significant labor time
- Black e-coat electrocoating finish - provides a construction-durable nonmetallic coating for corrosion resistance in interior dry-service applications, while contributing to a professional aesthetic when left exposed
- Deep T50 6-lobe drive recess - delivers a secure, high-torque drive engagement that reduces cam-out and improves driver control during installation
- Compliant with CSA O86:24 hydrogen embrittlement requirements - the optimized hardness profile helps mitigate the risk of brittle fracture for reliable, long-term structural performance
- 50 screws per box - packaged for job-site efficiency on high-volume timber framing and beam fastening tasks
Why This Product
- Designed specifically for large structural members - including mass timber, cross-laminated timber, glulam beams, and multi-ply engineered wood - this 23 5/8 in. screw reaches connection depths that standard fasteners cannot achieve, making it the right tool for heavy timber framing and beam reinforcement work.
- The SawTooth point eliminates predrilling in most applications, reducing setup time and labor cost without sacrificing connection integrity - a practical advantage on fast-moving commercial and residential timber projects.
- The black e-coat finish does double duty: it protects against corrosion in interior dry-service environments and delivers a polished, professional appearance when screws are left exposed - meeting both structural and aesthetic requirements in a single fastener.
- CSA O86:24 hydrogen embrittlement compliance and an optimized hardness profile mean this screw is engineered to resist brittle fracture over time, supporting the long-term reliability demands of structural connections in engineered wood and heavy timber assemblies.
Specifications
- Brand: Simpson Strong-Tie
- Model Number: SDCFC10X600
- Product Name: Strong-Drive SDCFC TIMBER-CFC Screw
- Length: 23 5/8 in.
- Shank Diameter: 0.290 in.
- Head Diameter: 0.528 in.
- Thread Length: 22 5/8 in.
- Head Type: Cylinder Head
- Drive Type: T50 6-Lobe
- Point Type: SawTooth Point
- Coating: E-coat Electrocoating
- Finish: E-coat Electrocoating
- Color: Black
Approved Applications
- Engineered Wood
- Fastening Wood-to-Wood
- Timber Framing
- Beam Reinforcement
- Fastening Wall-to-Wall
- Fastening Support Beams
- Heavy Timber
- Glulam
- Fastening Butt Joists
- Mass Timber / Cross-Laminated Timber
- Engineered Wood - Multi-Ply Fastening
- Fastening Simpson Strong-Tie Connectors
What's Included
- 50x SDCFC10X600 Timber-CFC Screws (0.390 in. x 23 5/8 in., T50, Black E-Coat)
- T50 6-lobe driver bit (replacement bit: BIT50T-2-R1)
Reviews
FAQs
Standard Shipping is free on most orders over $50 within the contiguous US. If the order is under $50.00, the shipping is $9.99 set fee for shipping within the contiguous US.
Most of our products will ship within 1 to 3 Business Days. Some Special order products will ship within 2 to 5 Business Days. Preorders will be shipped to you on a first come first serve basis as soon as available from the manufacturer. Items that are "Made-to-Order" (Custom order products) will be shipped when fabrication is completed, shipping and delivery times will vary and depend on manufacturing.
Products that are shipped directly from the manufacturer will have processing and fulfilment times subject to manufacturer availability.
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Freight shipping Policy:
Orders/Items too large or heavy may require special handling/Shipping and may require to be sent by truck. Someone must be present to accept truck deliveries. Standard truck delivery is to a dock facility designed to receive freight. You will be notified within 24 hours of ordering to confirm delivery. Lift gates for deliveries are available for an additional fee.
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