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Cortex® for PRO® and EDGE®

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.

Antique Leather®
Dark Roast®
Dark Teak
Maritime Gray
Whitewash Cedar®
Blends Beautifully In

Fastener remains hidden because the included plug is made from TimberTech decking and color-matched to all TimberTech PRO and EDGE 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.


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 plugs)
• Plug replacement pack (40 plugs)

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

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 PRO and TimberTech EDGE 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 PRO & EDGE 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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