Simpson Strong-Tie Strong-Drive SDHR COMBO-HEAD Screw (Black E-Coat)

Proven Performance - Now in Black E-Coat Finish

The Strong-Drive® SDHR Combo-Head screw is a structural fastener designed for cross-laminated timber (CLT), mass timber construction and general interior applications. These partially threaded, heavy-duty 10 mm (0.390")- and 12 mm (0.470")-diameter structural fasteners are designed to provide excellent connection strength, especially when connecting steel plate or angle connectors to wood. The unique “combination” head allows for the convenience of driving with either a hex-driver bit or 6-lobe driver bit. The SDHR Combo-Head has a friction-reducing, black e-coat finish and optimized hardness profile that mitigates embrittlement issues. A robust, knurled shank and Type-17 point allow for fast starts and low-torque driving, making it ideal for driving into wood without the need for predrilling. The SDHR screws are load rated for shear and withdrawal resistance and designed for dry-service applications.

• Black e-coat finish provides a construction-durable, nonmetallic and friction-reducing coating for corrosion resistance in interior dry-service conditions
• Optimized hardness profile helps mitigate field embrittlement issues, and is compliant with CSA O86:24 hydrogen embrittlement requirements
• Designed for use with steel side plates
• Can be driven by a 15 mm (SDHR10) or 17 mm (SDHR12) hex-head driver bit, or a T40 6-lobe driver bit
• Heavy-duty shank with robust knurl reduces installation torque
• Type-17 point ensures fast starts, reduces installation torque and eliminates the need for predrilling in most applications
• Hex head with deep T40, 6-lobe recess for a secure drive
• ICC-ES ESR-3046

Specifications (all models)

• Fastener Type: Hand-Drive Screw
• Head Type: Combination
• Drive Type: T40 6-Lobe or Hex-Head
• Point Type: Type-17 Point
• Finish: E-coat Electrocoating
• Coating: E-Coat Electrocoating
• Color: Black
• Application: Metal-to-wood connections, including steel plate-to-sawn wood, glulam, cross-laminated timber (CLT), or composite lumber products

Available options (see each model for exact values)

• Fastener Callout Size: 10 mm x 100 mm, 10 mm x 160 mm, 12 mm x 100 mm, 12 mm x 160 mm
• Length (in.): 4, 6 1/4
• Length (mm): 100, 160
• Shank Diameter (in.): 0.275, 0.315
• Head Diameter (in.): 0.590, 0.669
• Thread Length (in.): 2 1/8, 4 3/8
• Packaging Type: Box, Carton