Product Description
Simpson Strong-Drive SDCF TIMBER-CF Screw - 0.390 in. x 4 in., T50, E-Coat by Simpson Strong-Tie is a structural wood screw engineered for cross-laminated timber (CLT), mass timber construction, and demanding general interior fastening applications. The redesigned SDCF Timber-CF combines a fully-threaded heavy-duty shank with a black e-coat electrocoating finish, delivering reliable withdrawal resistance and corrosion protection in interior dry-service environments. Whether you are securing glulam beams, fastening engineered wood assemblies, or connecting Simpson Strong-Tie hardware connectors, this screw is purpose-built for structural timber applications where uncompromised strength and clean installation matter most.
Key Features
- Flat head with underhead nibs - countersinks cleanly into timber surfaces for a flush, professional finish that does not require additional surface preparation
- Heavy-duty, fully-threaded shank - maximizes withdrawal resistance along the full length of the fastener, providing consistent structural holding power in mass timber and engineered wood applications
- SawTooth point - starts fast and drives easily without predrilling in most applications, saving installation time and reducing setup effort
- Black e-coat electrocoating finish - provides a construction-durable, nonmetallic coating for corrosion resistance in interior dry-service conditions while also enhancing the appearance of exposed timber connections
- Deep T50 6-lobe recess - delivers a secure, high-torque drive that reduces cam-out and keeps the driver bit firmly engaged during installation
- Optimized hardness profile - works together with the e-coat finish to help mitigate the risk of brittle fracture, supporting long-term structural reliability
- Compliant with CSA O86:24 hydrogen embrittlement requirements - meets Canadian engineered wood design standards for structural screw performance
- 0.290 in. shank diameter with 3 5/8 in. thread length - delivers deep thread engagement for strong wood-to-wood and wood-to-steel connections
Why This Product
- Designed specifically for CLT and mass timber - the SDCF Timber-CF is purpose-engineered for cross-laminated timber, glulam, multi-ply engineered wood, and heavy timber framing where standard screws may not meet structural demands
- Eliminates predrilling in most applications - the SawTooth point reduces installation torque and gets you started immediately, cutting labor time on large-scale timber construction and general interior fastening projects
- Black e-coat finish serves dual purposes - the nonmetallic electrocoating provides interior corrosion protection while also delivering an aesthetically consistent look for exposed timber connections and beam reinforcement work
- Meets CSA O86:24 hydrogen embrittlement standards - for projects requiring verified compliance with Canadian structural wood design codes, this screw satisfies those requirements without needing a substitute fastener
Specifications
- Brand: Simpson Strong-Tie
- Product Name: Strong-Drive SDCF TIMBER-CF Screw
- Length: 4 in.
- Shank Diameter: 0.290 in.
- Head Diameter: 0.725 in.
- Thread Length: 3 5/8 in.
- Head Type: Flat Head with Nibs
- Drive Type: T50 6-Lobe
- Point Type: SawTooth Point
- Coating: E-coat Electrocoating
- Finish: E-coat Electrocoating
- Color: Black
Available Pack Options
- SDCF10X100-R30: 30 Pk - includes T50, 6-lobe driver bit (replacement bit: BIT50T-2-R1)
- SDCF10X100: 250 Pk - includes T50, 6-lobe driver bit (replacement bit: BIT50T-2-R1)
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
- T50, 6-lobe driver bit (replacement bit: BIT50T-2-R1)
Reviews
FAQs
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