Simpson Strong-Drive SDCP TIMBER-CP Screw - 8 mm x 180 mm, Black E-Coat by Simpson Strong-Tie is a structural timber screw engineered for cross-laminated timber (CLT), mass timber construction, and general interior wood fastening applications. This black e-coated, partially threaded fastener is built to pull structural members together with superb holding power, delivering reliable performance in demanding engineered wood and timber framing assemblies. The low-friction e-coat finish, Type-17 point, and deep T40 6-lobe drive recess combine to make installation fast and straightforward - reducing torque requirements and eliminating the need for predrilling in most applications.

Key Features

• Black e-coat electrocoating finish - provides a construction-durable, nonmetallic, friction-reducing coating approved for ICC-ES AC257 Exposure Condition 3, making it suitable for use with fire-retardant treated (FRT) lumber and offering corrosion resistance in dry-service interior environments
• Optimized hardness profile compliant with CSA O86:24 - mitigates the risk of external hydrogen embrittlement, reducing the chance of brittle fracture in structural timber connections where long-term reliability is critical
• Flat head with underhead nibs - enables clean, flush countersinking without additional tooling, leaving a smooth, professional surface finish in visible and structural applications alike
• Deep T40, 6-lobe recess (driver bit included) - delivers a secure, slip-resistant drive engagement that reduces cam-out and provides confident control when driving into dense timber materials
• Heavy-duty shank construction - provides the structural strength and durability demanded by mass timber, post frame, and engineered wood multi-ply fastening applications
• Shank knurl design - aids in torque reduction during installation, lessening driver fatigue and improving efficiency across high-volume fastening work
• Type-17 point - ensures fast starts and reduces installation torque, eliminating the need for predrilling in most applications and speeding up workflow on timber framing and modular construction projects
• Length: 180 mm (7 in.) with 3 1/8 in. thread length - sized for deep structural engagement in CLT, structural composite lumber, and general wood-to-wood connections

Why This Product

• Specifically engineered for cross-laminated timber and mass timber construction, where structural integrity and consistent fastener performance are non-negotiable - the e-coat finish and CSA O86:24-compliant hardness profile address the unique demands of these assemblies
• The low-friction black e-coat reduces driving torque compared to uncoated fasteners, allowing for faster installation with less effort in dense engineered wood and timber framing substrates
• No predrilling required in most applications - the Type-17 point and shank knurl work together to reduce installation effort and eliminate extra steps, keeping timber framing and general framing projects moving efficiently
• The flat head with nibs countersinks cleanly flush with the surface, making this screw ideal for applications in factory-built and modular construction where a clean finished appearance matters alongside structural performance

Specifications

• Brand: Simpson Strong-Tie
• Product Name: Strong-Drive SDCP TIMBER-CP Screw
• Length: 7 in. (180 mm)
• Shank Diameter: 0.225 in.
• Head Diameter: 0.575 in.
• Thread Length: 3 1/8 in.
• Head Type: Flat Head with Nibs
• Drive Type: T40 6-Lobe
• Point Type: Type-17 Point
• Coating: E-coat Electrocoating
• Finish: E-coat Electrocoating
• Color: Black