Simpson Strong-Drive SDCFC TIMBER-CFC Screw - 0.315 in. x 9-1/2 in. T40, E-Coat by Simpson Strong-Tie is a heavy-duty structural fastener engineered for demanding timber construction applications involving large members, including mass timber, glulam, and engineered wood assemblies. The redesigned SDCFC screw combines a fully threaded shank for superior withdrawal resistance with a compact cylinder head that delivers a clean, polished appearance whether left exposed or countersunk. The black e-coat electrocoating provides a construction-durable, nonmetallic finish suited for interior dry-service applications, while the SawTooth point allows fast, easy starts that minimize installation torque and eliminate the need for predrilling in most scenarios. Built for structural reliability, this fastener is compliant with CSA O86:24 hydrogen embrittlement requirements, making it a dependable choice for timber framing, beam reinforcement, and cross-laminated timber connections.

Key Features

• Compact cylinder head - helps countersink the screw flush with the surface for a clean, professional finish whether left exposed or concealed in wood-to-wood connections
• Fully threaded shank - provides heavy-duty strength and superb withdrawal resistance along the entire fastener length, critical for structural timber applications
• SawTooth point - enables fast starts and easy driving, reducing installation torque and eliminating the need for predrilling in most applications to speed up workflow
• Black e-coat electrocoating finish - delivers a construction-durable, nonmetallic coating for corrosion resistance in interior dry-service environments while enhancing the fastener's appearance
• Deep T40 6-lobe recess - provides a secure, slip-resistant drive connection that reduces cam-out and improves installation control
• Optimized hardness profile - works together with the e-coat finish to help mitigate the risk of brittle fracture, supporting reliable long-term structural performance
• CSA O86:24 compliant - meets hydrogen embrittlement requirements, confirming the fastener's suitability for code-recognized structural applications in timber construction
• 0.315 in. diameter x 9-1/2 in. length - substantial sizing designed for penetrating deep into large structural members such as heavy timber, multi-ply engineered wood, and glulam beams

Why This Product

• Engineered for mass timber and heavy structural assemblies - the fully threaded 9-1/2 in. shank and 0.315 in. diameter make this screw purpose-built for connecting large members like cross-laminated timber, glulam, and multi-ply engineered wood where standard fasteners fall short
• Installs faster with no predrilling in most applications - the SawTooth point bites into wood immediately, reducing setup time and labor cost on timber framing and beam reinforcement projects
• Reliable corrosion resistance without sacrificing aesthetics - the black e-coat electrocoating protects against corrosion in interior dry-service conditions while producing a refined appearance for exposed structural connections
• Meets structural code requirements - compliance with CSA O86:24 hydrogen embrittlement requirements gives builders and engineers documented confidence in the fastener's performance for load-bearing timber connections

Specifications

• Brand: Simpson Strong-Tie
• Product Name: Strong-Drive SDCFC TIMBER-CFC Screw
• Diameter: 0.315 in.
• Length: 9-1/2 in.
• Shank Diameter: 0.230 in.
• Thread Length: 9 in.
• Head Type: Cylinder Head
• Head Diameter: 0.400 in.
• Drive Type: T40 6-Lobe
• Point Type: SawTooth Point
• Coating: E-coat Electrocoating
• Finish: E-coat Electrocoating
• Color: Black