Simpson Strong-Drive SDCP TIMBER-CP Screw - 8 mm x 280 mm, Black E-Coat by Simpson Strong-Tie is a structural wood screw engineered for cross-laminated timber (CLT), mass timber construction, and general interior wood framing applications. This partially threaded fastener is designed to pull structural members together with superb holding power, delivering excellent load capacity in engineered wood, timber framing, and wood-to-wood connections. The black e-coat electrocoating finish offers a low-friction, nonmetallic surface that simplifies installation while providing corrosion resistance approved for ICC-ES AC257 Exposure Condition 3 - making this screw a trusted choice for demanding interior structural work.

Key Features

• Black e-coat electrocoating finish - provides a construction-durable, nonmetallic, friction-reducing coating approved for use with fire-retardant treated (FRT) lumber and meets ICC-ES AC257 Exposure Condition 3, giving installers confidence in demanding interior environments
• Optimized hardness profile compliant with CSA O86:24 - mitigates external hydrogen embrittlement risk, reducing the chance of brittle fracture in structural connections and meeting current Canadian engineered wood standards
• Flat head with underhead nibs - enables clean countersinking flush with the surface for a finished, professional appearance without additional tooling
• Deep T40, 6-lobe recess drive - provides a secure, camout-resistant drive engagement so installers can apply consistent torque without bit slippage; driver bit included
• Heavy-duty shank with shank knurl - delivers strength and durability in structural members while the knurl actively reduces installation torque, easing the drive in dense timber
• Type-17 point - ensures fast starts and reduces installation torque, eliminating the need for predrilling in most applications and speeding up workflow on the job site
• Partial thread design - pulls structural members tightly together with superior clamping force, maximizing holding power in timber-to-timber and engineered wood connections
• Length: 280 mm (11 in.) with a 3 1/8 in. thread length - sized for deep structural penetration in mass timber, glulam, LVL, and structural composite lumber assemblies

Why This Product

• Purpose-built for mass timber and CLT construction - the SDCP screw is specifically designed for cross-laminated timber and mass timber applications, providing the deep penetration, partial threading, and clamping performance that structural timber connections demand
• Reduces installation time without sacrificing structural performance - the Type-17 point, shank knurl, and low-friction e-coat coating work together to lower driving torque and eliminate predrilling in most applications, keeping crews productive on timber framing and general framing projects
• Addresses hydrogen embrittlement concerns in engineered wood - the CSA O86:24 compliant hardness profile directly mitigates brittle fracture risk, making this screw the appropriate choice where code compliance and long-term structural integrity are priorities
• Approved for fire-retardant treated lumber (FRT) and interior dry-service conditions - the nonmetallic e-coat finish is rated for use with chemically sensitive FRT lumber, expanding its suitability across factory-built, modular, and post-frame interior construction applications

Specifications

• Brand: Simpson Strong-Tie
• Product Name: Strong-Drive SDCP TIMBER-CP Screw
• Diameter: 8 mm
• Length: 280 mm (11 in.)
• 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