Simpson Strong-Drive SDCP TIMBER-CP Screw - 10 mm x 240 mm, Black E-Coat by Simpson Strong-Tie is a heavy-duty structural fastener engineered for cross-laminated timber (CLT), mass timber construction, and general interior wood framing applications. The black e-coat electrocoating delivers a construction-durable, friction-reducing finish that eases installation while providing corrosion resistance suitable for fire-retardant treated (FRT) lumber. Designed as a partially threaded structural screw, this fastener draws wood members tightly together with high holding power - making it a dependable choice for timber framing, engineered wood assemblies, post frame construction, and multi-ply fastening applications where structural integrity is paramount.

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 FRT lumber and offering meaningful corrosion resistance in interior dry-service environments
• Optimized hardness profile compliant with CSA O86:24 - mitigates the risk of external hydrogen embrittlement and brittle fracture, supporting long-term structural reliability in mass timber applications
• Flat head with underhead nibs - allows the screw to countersink cleanly and sit flush with the wood surface for a professional, snag-free finish
• Deep T40 6-lobe recess - delivers a secure, slip-resistant drive connection that reduces cam-out during installation; a driver bit is included
• Heavy-duty shank with shank knurl - provides strength and durability while the knurl actively reduces torque during driving, making installation easier
• Type-17 point - ensures fast starts and reduced installation torque, eliminating the need for predrilling in most applications and speeding up workflow on the job site
• Partially threaded design with 3 1/8 in. thread length - draws structural members together tightly for superior clamping action and excellent load capacity
• Shank diameter of 0.275 in. and head diameter of 0.700 in. - sized for structural applications in CLT, glulam, LVL, and other engineered wood products

Why This Product

• Built specifically for mass timber and CLT construction - the SDCP screw's optimized hardness profile and CSA O86:24 compliance directly address the hydrogen embrittlement concerns common in dense, high-stress timber structures, giving builders confidence in structural performance
• Low-friction e-coat means less effort per fastener - the black electrocoating reduces driving torque compared to uncoated screws, helping crews work faster through large-volume timber fastening tasks without over-stressing drive tools
• No predrilling required in most applications - the Type-17 point and shank knurl reduce resistance on entry, cutting labor time and eliminating a separate prep step in wood-to-wood and multi-ply engineered wood assemblies
• Approved for FRT lumber and corrosion-resistant service - ICC-ES AC257 Exposure Condition 3 approval means this fastener is verified for use with fire-retardant treated lumber, a critical requirement in many commercial and factory-built or modular construction projects

Specifications

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