Simpson Strong-Tie 8mm x 180mm SDCP Timber-CP Screw - Black E-Coat | Qty. 50
Simpson Strong-Tie 8mm x 180mm SDCP Timber-CP Screw - Black E-Coat | Qty. 50!
Simpson Strong-Tie 8mm x 180mm SDCP Timber-CP Screw - Black E-Coat | Qty. 50
Specifications
Structural timber screws made for CLT and mass timber connections. The Simpson Strong-Tie Strong-Drive SDCP Timber-CP screw in Black E-Coat is a large timber screw built for panel, wall, floor, and beam connections in cross-laminated timber construction. Choose from 8mm and 10mm diameters, each offered in multiple lengths, to match the timber and the connection at hand.
These heavy duty timber screws pair a countersunk flat head with a sharp Type 17 point and a deep T40 6-lobe recess, and they are ICC certified (ESR-3046). Review Simpson Strong-Tie's product documentation and the ICC-ES evaluation report, and consult a qualified professional, for load values and approved conditions of use.
Key Features
- Made for CLT mass timber: A heavy duty timber fastener designed for connections in CLT and other mass timber systems, available in 8mm and 10mm diameters.
- Flat head with nibs: Countersunk flat head timber screws that finish clean against the timber surface.
- Type 17 sharp point: A sharp point built for use in CLT.
- Black E-Coat finish and CSA O86:24 hardness profile: These black timber screws carry a hardness profile compliant with CSA O86:24 that mitigates hydrogen embrittlement issues.
- Deep T40 6-lobe recess: A deep recess for solid bit engagement. Replacement bit: BIT40T-134-R2.
Applications
- Wall-to-wall and wall-to-floor connections: Joining CLT wall panels to each other and to floor panels in mass timber buildings.
- Floor-to-floor connections: Tying adjacent CLT floor panels together.
- Panel-to-beam and panel-to-wall connections: Connecting CLT panels to timber beams and to wall panels.
- Surface splines and lap joints: Panel joints that call for a dependable timber construction screw.
- Ledger connections: Ledger attachments in timber frame and mass timber structures.
California Residents: WARNING
Add the Essentials
Complete your order with these essentials, compatible with:
Simpson Strong-Tie 8mm x 180mm SDCP Timber-CP Screw - Black E-Coat | Qty. 50











Add the Essentials
Complete your order with these essentials, compatible with:
Simpson Strong-Tie 8mm x 180mm SDCP Timber-CP Screw - Black E-Coat | Qty. 50
Serious Strength and Reliability
Engineered for demanding projects, Structural Screws deliver outstanding load-bearing power—far more than standard screws—so you can trust your work. Whether it’s a deck, framing or outdoor structure, you can trust it will stay solid and secure for years.
Fast, Effortless Installation
Self-tapping tips create their own hole, eliminating pre-drilling and speed up installation. Deep, aggressive threads bite firmly into the wood for superior holding power that resists loosening over time. Get a stronger build with less effort.
Professional-Strength Connector Screws
Designed to replace nails in approved Simpson Strong‑Tie connectors, Connector Screws deliver superior holding power while being faster and more precise to install. Ideal for contractors and builders who need reliable, code-compliant connections.
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We are on a mission to expand our national reach—offering more product selection and faster delivery times. So far we’ve made remarkable progress in our expansion efforts, effectively doubling our capacity by adding a new 47,000 sq. ft. warehouse in Simpsonville, South Carolina, in addition to our existing 60,000 sq. ft. facility in Urbana, Iowa.
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We pride ourselves on delivering a user-friendly, high quality experience online and over the phone. Our knowledgeable team of experts is readily available via phone to assist with product questions and custom pricing inquiries. We’re available Monday thru Friday from 7:00 AM – 5:00 PM CST. We look forward to supporting you on your next job.
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We partner with trusted manufacturers in the fasteners industry to bring our customers a selection of over 10,000 different products. Fasteners Plus is one of only four Certified Platinum E-Commerce Vendors of Simpson Strong-Tie products, one of the largest suppliers of high-quality structural building products in the world.

