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Cortex® for Composite

Our strongest hidden fastener system provides a clean look, using a high quality, ACQ approved, specialty deck screw with a TORX® ttap® drive system. The best hidden fastener for stairs and perimeter boards.

Visit your local dealer or retailer to see and learn more about this product.

Reclaimed Chestnut
Dark Oak
Natural White Oak
Weathered Oak
Antique Leather®
Dark Roast®
Driftwood
Ashwood
Dark Teak
Espresso™
Maritime Gray
Mocha
Pecan
Tigerwood
Whitewash Cedar®
Reclaimed Chestnut
Dark Oak
Natural White Oak
Weathered Oak
Antique Leather®
Dark Roast®
Driftwood
Ashwood
Dark Teak
Espresso™
Maritime Gray
Mocha
Pecan
Tigerwood
Whitewash Cedar®
Clear
Blends Beautifully In

Fastener remains hidden because the included plug is made from TimberTech decking and color-matched to all TimberTech Composite collections.*

*Excludes scalloped Terrain™ and Prime Collection boards

Strong and Specialized

Deck screw is high quality, ACQ approved, and has a Torx®ttap® drive system.

Compatible

Unlike other hidden fasteners, Cortex fasteners can be used on the entire deck surface, including stairs and perimeters.

Available in:
  • 100 ln. ft. (224 carbon steel screws, 300 loose plugs)
  • 100 ln. ft. (224 carbon steel screws, 320 collated plugs)
  • 300 sq. ft – (1050 carbon steel screws, 1200 collated plugs)

*Cortex not compatible with scalloped Terrain, Prime+, and Prime Collection boards

  • 100 sq. ft – Cortex ® 316 Stainless Steel Screws (350 screws only)
  • 100 sq. ft – Cortex ® for Decking as Cladding (365 screws only)
  • 100 sq. ft – Cortex ® Aluminum Driller (350 screws only)
  • Plug replacement pack (40 loose plugs only)
  • 100 sq. ft plug pack (400 loose plugs only)
Questions About Installation?

We’re here to assist you with videos, guides, and more. View installation help.

The Best Warranty Coverage

TimberTech products are engineered the right way, to last. And many are covered by leading warranties. See full warranty details.

Is predrilling required when installing TimberTech Composite decking?

Predrilling is required when installing Cortex with any uncapped or capped composite deck board. It is recommended to use a 7/32″ drill bit to pilot a hole halfway through the deck board but not into the framing.

Can I use Cortex fasteners with steel or aluminum framing?

Cortex for Composite is not compatible with metal framing. For steel framing applications, Cortex Drillers (1-5/8″ 410 stainless steel screws) can be purchased through FastenMaster. To special order the deck plugs needed specifically for your project, please contact 1-800-518-3569.

Can TimberTech Cortex fasteners be used for all decking?

TimberTech Cortex fasteners can be used on all full-profile TimberTech deck boards, except for scalloped boards from our Terrain, Prime, Prime+ and Reliaboard collections.

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Where to Buy

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Questions? We’re here to help.

From choosing your decking and railing to installation and maintenance, we can help you every step of the way.

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