Deck Screw — Outdoor, Corrosion-Resistant
Deck screws are wood screws optimized for exterior decking and treated lumber service: heavy corrosion-resistant coating, sharp point, ribbed head, and a drive type (Torx or square) designed to handle high installation torque. Coatings are typically epoxy or polymer-based, color-matched to natural wood tones.
Specifications
| Coatings | Epoxy polymer (typical 'brown' deck screw), ACQ-rated for treated lumber, Stainless 305 |
|---|---|
| Drive | Torx (T20/T25), Square #2, Combo Phillips-Square |
| Diameter | #8, #9, #10 / 4 mm, 4.5 mm, 5 mm |
| Length | 1-1/4" – 4" (32 mm – 100 mm) |
| Color | Tan, Brown, Green, Cedar, Black to match common wood finishes |
Frequently Asked Questions
Why do deck screws need ACQ-compatible coatings?
Modern pressure-treated lumber uses ACQ (alkaline copper quaternary) preservatives instead of older CCA. ACQ is significantly more corrosive to metal fasteners than CCA was, so deck screws sold for treated lumber must have coatings rated to resist this corrosion. Standard zinc plating is not sufficient.
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