Simpson Strong-Drive SDCFC TIMBER-CFC Screw - 0.315 in. x 13-3/4 in., T40, E-Coat by Simpson Strong-Tie is a heavy-duty structural wood screw engineered for demanding timber connections involving large members such as mass timber, glulam beams, and engineered wood assemblies. The redesigned SDCFC TIMBER-CFC screw combines a fully threaded shank for maximum withdrawal resistance with a compact cylinder head that delivers a clean, professional finish whether left exposed or countersunk. The proprietary SawTooth point bites into wood quickly, reducing installation torque and eliminating the need for predrilling in most applications - making it a practical choice for high-volume timber framing, beam reinforcement, and cross-laminated timber fastening. The black e-coat electrocoating finish enhances aesthetics while providing a construction-durable, nonmetallic barrier against corrosion in interior dry-service conditions, and the optimized hardness profile helps mitigate the risk of brittle fracture for reliable long-term performance.

Key Features

• Compact cylinder head design - helps countersink the screw flush for a clean, polished finish in exposed timber applications or a concealed look when fully set
• Heavy-duty, fully threaded shank - provides superb withdrawal resistance along the entire shank length, maximizing holding power in large timber members and multi-ply engineered wood
• SawTooth point - enables fast starts and easy driving into dense wood without predrilling in most applications, saving significant labor time on the job site
• Black e-coat electrocoating finish - delivers a construction-durable nonmetallic coating that resists corrosion in interior dry-service applications while enhancing the screw's visual appearance in exposed timber work
• Deep T40 6-lobe recess - provides a secure, cam-out-resistant drive connection, reducing driver slippage and improving control during installation
• Optimized hardness profile - works in combination with the e-coat finish to mitigate the risk of brittle fracture, supporting long-term structural reliability
• Compliant with CSA O86:24 hydrogen embrittlement requirements - meets Canadian standard requirements, confirming the screw's suitability for structural timber applications in compliance-driven markets

Why This Product

• Designed specifically for mass timber and large structural members - the fully threaded shank maximizes withdrawal resistance exactly where heavy timber and glulam connections demand it most, making this screw a purpose-built solution rather than a general-purpose fastener
• Eliminates predrilling in most applications - the SawTooth point reduces installation torque and speeds up driving, cutting labor time significantly on large timber framing and beam reinforcement projects
• Black e-coat finish suits exposed timber aesthetics - the nonmetallic electrocoating provides corrosion resistance for interior dry-service use while blending cleanly with dark wood tones, making it a practical choice for visible architectural timber applications
• Includes a T40 6-lobe driver bit - the screw ships with a compatible driver bit so installers can get started immediately without sourcing additional accessories separately

Specifications

• Brand: Simpson Strong-Tie
• Product Name: Strong-Drive SDCFC TIMBER-CFC Screw
• Length: 13-3/4 in.
• Shank Diameter: 0.230 in.
• Head Diameter: 0.400 in.
• Thread Length: 13-3/8 in.
• Head Type: Cylinder Head
• Drive Type: T40 6-Lobe
• Point Type: SawTooth Point
• Coating: E-coat Electrocoating
• Finish: E-coat Electrocoating
• Color: Black