Simpson Strong-Drive SDCP TIMBER-CP Screw - 8 mm x 240 mm, Black E-Coat by Simpson Strong-Tie is a structural wood fastener engineered for cross-laminated timber (CLT), mass timber construction, and general interior wood-to-wood fastening applications. This partially threaded screw delivers exceptional holding power and load capacity, pulling structural members together with precision and confidence. The black e-coat electrocoating finish provides a construction-durable, nonmetallic, low-friction surface that reduces driving torque while offering corrosion resistance suitable for fire-retardant treated (FRT) lumber. Whether used in timber framing, engineered wood assemblies, post frame construction, or factory-built modular projects, this heavy-duty structural screw is built to perform in demanding dry-service environments.

Key Features

• Black e-coat electrocoating finish - provides a durable, nonmetallic, friction-reducing surface approved for FRT lumber and rated for ICC-ES AC257 Exposure Condition 3, reducing corrosion risk in interior structural applications
• Optimized hardness profile compliant with CSA O86:24 - mitigates external hydrogen embrittlement issues, reducing the risk of brittle fracture in demanding structural connections
• Flat head with underhead nibs - enables clean countersinking flush with the wood surface for a professional, finished appearance without additional surface prep
• Deep T40, 6-lobe recess drive - provides a secure, cam-out-resistant engagement for more controlled driving torque and reduced installer fatigue (driver bit included)
• Heavy-duty shank - delivers the strength and durability required for structural timber and engineered wood connections
• Shank knurl - aids in torque reduction during installation, helping installers drive screws more efficiently with standard tools
• Type-17 point - ensures fast starts and reduced installation torque, eliminating the need for predrilling in most applications and speeding up the work
• Partially threaded design - pulls structural members tightly together with superb holding power and excellent load capacity
• Length: 240 mm (9 1/2 in.) with a thread length of 3 1/8 in. - sized for deep structural timber connections that require significant fastener engagement

Why This Product

• Purpose-built for mass timber and CLT construction - this screw's partial threading, heavy-duty shank, and flat head with nibs are specifically designed to handle the demands of cross-laminated timber and engineered wood multi-ply fastening, making it the right tool for modern mass timber projects
• Faster installation with no predrilling required in most applications - the Type-17 point and low-friction e-coat combine to reduce installation torque and speed up the job, which matters on large timber framing or post frame projects with dozens to hundreds of fasteners
• Code-compliant corrosion and embrittlement protection - the e-coat finish meets ICC-ES AC257 Exposure Condition 3 for FRT lumber, and the hardness profile satisfies CSA O86:24, giving engineers and contractors documented compliance for structural timber connections
• Designed for interior and dry-service structural applications - from general framing and floor-to-floor connections to structural composite lumber and factory-built modular construction, this fastener addresses a wide range of engineered wood fastening needs under one product

Specifications

• Brand: Simpson Strong-Tie
• Product Name: Strong-Drive SDCP TIMBER-CP Screw
• Length: 9 1/2 in. (240 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