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.
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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
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.
*Cortex not compatible with scalloped Terrain™, Prime+, and Prime Collection boards
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TimberTech products are engineered the right way, to last. And many are covered by leading warranties. See full warranty details.
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.
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.
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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