Simpson Strong-Drive SDCP TIMBER-CP Screw - 10 mm x 280 mm, Black E-Coat by Simpson Strong-Tie is a structural wood fastener purpose-built for cross-laminated timber (CLT), mass timber construction, and general interior framing applications. The black e-coat electrocoated finish delivers a construction-durable, nonmetallic surface that reduces drive friction and meets ICC-ES AC257 Exposure Condition 3 requirements, making this fastener a reliable choice for fire-retardant-treated (FRT) lumber and dry-service environments. Partially threaded for superior member pull-together performance, this 11 in. (280 mm) screw combines a flat countersinking head, a Type-17 point, and a deep T40 6-lobe drive recess to streamline installation in engineered wood, structural composite lumber, and multi-ply wood assemblies.

Key Features

• Black e-coat electrocoating finish - provides a construction-durable, nonmetallic, friction-reducing coating approved for FRT lumber and corrosion resistance under ICC-ES AC257 Exposure Condition 3, so you can drive faster with less effort in demanding interior applications
• Optimized hardness profile compliant with CSA O86:24 - mitigates external hydrogen embrittlement risk, giving you added structural reliability and code-compliant confidence in mass timber and CLT builds
• Flat head with underhead nibs - helps the fastener countersink cleanly for a flush surface finish, reducing the need for additional surface prep after installation
• Deep T40, 6-lobe recess - provides a secure, slip-resistant drive interface, reducing cam-out risk and allowing consistent torque transfer even during heavy structural fastening
• Heavy-duty shank with shank knurl - delivers strength and durability while the knurl aids in reducing installation torque, saving time and driver wear on the job
• Type-17 point - ensures fast starts and reduced installation torque, and eliminates the need for predrilling in most applications so you can move efficiently through structural assemblies
• Partially threaded design with 3 1/8 in. thread length - engineered to pull structural members tightly together with superb holding power and excellent load capacity in wood-to-wood connections
• 0.700 in. flat head diameter with 0.275 in. shank diameter - sized for structural performance across engineered wood, timber framing, and modular construction applications

Why This Product

• Designed specifically for CLT and mass timber - this screw's partially threaded shank, flat countersinking head, and structural holding power make it a natural fit for cross-laminated timber and engineered wood assemblies where conventional fasteners fall short
• Drives with less torque and no predrilling in most applications - the combination of the low-friction e-coat finish, Type-17 point, and shank knurl means faster installation with less wear on bits and tools, an important advantage on large structural framing projects
• Addresses hydrogen embrittlement concerns head-on - Simpson Strong-Tie's CSA O86:24-compliant hardness profile is engineered to reduce brittle fracture risk, a critical reliability factor in structural timber connections
• Approved for FRT lumber and interior dry-service conditions - the black e-coat finish meets ICC-ES AC257 Exposure Condition 3 for corrosion resistance, giving builders the versatility to use one fastener across multiple interior structural scenarios including factory-built and modular construction

Specifications

• Brand: Simpson Strong-Tie
• Product Name: Strong-Drive SDCP TIMBER-CP Screw
• Length: 11 in. (280 mm)
• Shank Diameter: 0.275 in.
• Head Diameter: 0.700 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