Simpson Strong-Tie Strong-Drive SDWH TIMBER-HEX Screw
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The Simpson Strong-Tie Strong-Drive® SDWH TIMBER-HEX Screw is engineered for structural and general-purpose wood-to-wood fastening applications where a hex-head drive is preferred.
Its bold thread design ensures superior holding power, while the SawTooth® point facilitates fast starts and reduces installation torque, often eliminating the need for predrilling. The large washer head provides a broad bearing area, enhancing connection stability.
Additionally, the double-barrier coating offers corrosion resistance equivalent to hot-dip galvanization, making it suitable for exterior and preservative-treated wood applications.
Key Features
- Bold thread design provides superior holding power
- SawTooth® point ensures fast starts, reduces installation torque and eliminates the need for predrilling in most applications
- Underhead nibs allow for head to countersink into wood with reduced splintering
- Large washer head provides maximum bearing area (0.650" washer head diameter)
- Size identification on all SDWH screw heads
- 5/16" hex drive (replacement driver bit — BITHEXR516-R1)
Double-barrier coating provides corrosion resistance equivalent to hot-dip galvanization, making it suitable for certain exterior and preservative-treated wood applications, as described in the evaluation report.
Applications
- Structural wood-to-wood and engineered wood connections including ledgers