Description
The Simpson Strong-Tie Strong-Drive SDWS Timber screw is designed to provide an easy-to-install, high-strength alternative to through-bolting and traditional lag screws. This screw is ideal for the contractor and do-it-yourselfer alike. It is code listed in IAPMO UES ER-192 and meets IRC and IBC code requirements for most common wood framing applications. The 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.
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SawTooth point ensures fast starts, reduces installation torque and eliminates the need for predrilling in most applications
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Bold thread design provides superior holding power
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Underhead nibs allow for head to drive flush to surface with reduced splintering
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Large low-profile washer head provides maximum bearing area (0.760-in head diameter)
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Size identification on all SDWS screw heads
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6-lobe T40 drive provides positive engagement that makes the screw easy to drive and improves bit life (replacement driver bit: BIT40T-134-R2)
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Length: 8-in
