Product Description
Simpson Strong-Drive SDCF TIMBER-CF Screw - 0.315 in. x 11-3/4 in., T40, E-Coat by Simpson Strong-Tie is a heavy-duty structural fastener engineered for cross-laminated timber (CLT), mass timber construction, and demanding general interior wood applications. Redesigned for reliable long-term performance, this fully-threaded timber screw delivers exceptional withdrawal resistance and clean countersinking in wood-to-wood, wood-to-steel, glulam, and engineered wood assemblies. The black e-coat finish offers a construction-durable, nonmetallic coating suited to interior dry-service environments, while the optimized hardness profile helps mitigate the risk of brittle fracture - making this screw a dependable choice wherever structural integrity matters.
Key Features
- Flat head with underhead nibs - enables clean countersinking for a flush, professional finish in CLT, mass timber, and heavy timber applications
- Heavy-duty, fully-threaded shank - maximizes withdrawal resistance along the entire fastener length for superior holding power in structural wood connections
- SawTooth point - allows fast starts and easy driving, reducing installation torque and eliminating the need for predrilling in most applications
- Black e-coat electrocoating finish - provides a nonmetallic, construction-durable coating for corrosion resistance in interior dry-service conditions while enhancing aesthetics
- Deep T40 6-lobe recess - delivers a secure, cam-out-resistant drive connection for confident installation in demanding structural work
- Optimized hardness profile - works together with the e-coat finish to help mitigate the risk of brittle fracture for dependable, long-term structural performance
- Compliant with CSA O86:24 hydrogen embrittlement requirements - meets recognized industry standards, giving engineers and builders confidence in code-sensitive mass timber and CLT projects
- 0.230 in. shank diameter with 0.315 in. head diameter - proportioned for strength in heavy timber connections while seating cleanly below the wood surface
Why This Product
- Built for mass timber and CLT construction - the SDCF TIMBER-CF screw is specifically designed for cross-laminated timber, glulam, engineered wood multi-ply fastening, and heavy timber framing, making it a targeted solution rather than a general-purpose substitute
- No predrilling required in most applications - the SawTooth point reduces installation torque and speeds up workflow, cutting labor time on large-scale timber framing, beam reinforcement, and floor-to-floor assemblies
- Structural confidence backed by industry compliance - compliance with CSA O86:24 hydrogen embrittlement requirements means this fastener is appropriate for engineered wood applications where code conformance is required
- Long-term reliability through material science - the combination of black e-coat electrocoating and an optimized hardness profile actively reduces brittle fracture risk, providing durable performance in interior structural connections over the life of the building
Specifications
- Brand: Simpson Strong-Tie
- Product Name: Strong-Drive SDCF TIMBER-CF Screw
- Length: 11-3/4 in.
- Shank Diameter: 0.230 in.
- Head Diameter: 0.590 in.
- Head Type: Flat Head with Nibs
- Drive Type: T40 6-Lobe
- Point Type: SawTooth Point
- Thread Length: 11 1/3 in.
- Coating: E-coat Electrocoating
- Finish: E-coat Electrocoating
- Color: Black
Available Pack Options
- SDCF8X300-R50: 50 Pk - includes T40, 6-lobe driver bit (replacement bit: BIT40T-134-R2)
- SDCF8X300: 250 Pk - includes T40, 6-lobe driver bit (replacement bit: BIT40T-134-R2)
Approved Applications
- Mass Timber / Cross-Laminated Timber
- Heavy Timber
- Timber Framing
- Glulam
- Engineered Wood - Multi-Ply Fastening
- Engineered Wood
- Beam Reinforcement
- Fastening Wood-to-Wood
- Fastening Wood-to-Steel
- Fastening Support Beams
- Fastening Simpson Strong-Tie Connectors
- Fastening Wall-to-Wall
- Fastening Floor-to-Floor
- Fastening Stud-to-Plate
- Fastening Butt Joists
- Surface Splines
- General Interior
What's Included
- T40, 6-lobe driver bit (replacement bit: BIT40T-134-R2)
Reviews
FAQs
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