Product Description
Simpson Strong-Drive SDCF TIMBER-CF Screw - 0.315 in. x 9-1/2 in., T40, E-Coat by Simpson Strong-Tie is a structural wood screw engineered for cross-laminated timber (CLT), mass timber construction, and demanding general interior applications. With a fully-threaded, heavy-duty shank and SawTooth point, this fastener drives fast and clean into engineered wood, glulam beams, multi-ply assemblies, and timber framing connections - without predrilling in most applications. The black e-coat electrocoating finish delivers a construction-durable nonmetallic surface that resists corrosion in interior dry-service environments while keeping aesthetics clean and flush for visible timber connections.
Key Features
- Flat head with underhead nibs - enables clean countersinking so the screw sits flush with the wood surface for a finished, professional appearance
- Heavy-duty, fully-threaded shank - maximizes withdrawal resistance across the full fastener length, delivering structural holding power in CLT, glulam, and engineered wood assemblies
- SawTooth point - cuts into wood fiber quickly for fast starts and reduced installation torque, eliminating the need for predrilling in most applications
- Black e-coat electrocoating finish - provides a construction-durable nonmetallic coating for corrosion resistance in interior dry-service applications, while supporting optimized hardness that helps mitigate the risk of brittle fracture
- Deep T40 6-lobe drive recess - ensures a secure, positive engagement between bit and fastener, reducing cam-out during installation
- Compliant with CSA O86:24 hydrogen embrittlement requirements - confirms the fastener meets industry standards for structural reliability and long-term performance in mass timber applications
- 0.315 in. head diameter, 0.230 in. shank diameter, 9 in. thread length - engineered proportions that balance driving ease with structural strength in thick timber members
Why This Product
- Purpose-built for mass timber and CLT construction - the SDCF TIMBER-CF screw is specifically designed for cross-laminated timber, glulam, and multi-ply engineered wood fastening where structural integrity and load performance are non-negotiable
- Eliminates predrilling in most applications - the SawTooth point reduces installation time and labor on heavy timber projects, making it a practical choice for high-volume timber connections
- CSA O86:24 compliant for hydrogen embrittlement - meets rigorous structural standards, giving specifiers and installers confidence in long-term fastener performance in demanding interior timber applications
- Flush, clean finish from a single fastener - the flat head with nibs countersinks automatically, and the black e-coat finish blends with exposed timber for a refined result in architectural mass timber work
Specifications
- Brand: Simpson Strong-Tie
- Product Name: Strong-Drive SDCF TIMBER-CF Screw
- Length: 9-1/2 in.
- Shank Diameter: 0.230 in.
- Head Diameter: 0.590 in.
- Thread Length: 9 in.
- Head Type: Flat Head with Nibs
- Drive Type: T40 6-Lobe
- Point Type: SawTooth Point
- Coating: E-coat Electrocoating
- Finish: E-coat Electrocoating
- Color: Black
Available Pack Options
- SDCF8X240-R50: 50 Pk - includes T40, 6-lobe driver bit (replacement bit: BIT40T-134-R2)
- SDCF8X240: 250 Pk - includes T40, 6-lobe driver bit (replacement bit: BIT40T-134-R2)
Approved Applications
- Fastening Wood-to-Wood
- General Interior
- Fastening Support Beams
- Heavy Timber
- Mass Timber / Cross-Laminated Timber
- Engineered Wood - Multi-Ply Fastening
- Fastening Simpson Strong-Tie Connectors
- Engineered Wood
- Fastening Wood-to-Steel
- Timber Framing
- Surface Splines
- Beam Reinforcement
- Fastening Wall-to-Wall
- Glulam
- Fastening Butt Joists
- Fastening Floor-to-Floor
- Fastening Stud-to-Plate
What's Included
- T40, 6-lobe driver bit (replacement bit: BIT40T-134-R2)
Reviews
FAQs
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