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The Cortex Hidden Fastening System for TimberTech Decking is a strong, efficient, and easy way to install TimberTech deck boards. The color matching plugs are available in many popular TimberTech colors to match your deck boards perfectly. Using this system, you will get a fastener-free deck board surface that is both cost-effective and professional in appearance.

Key Features of the Cortex Hidden Fastening System

  • Fast and Easy: The deck boards are fastened in the same way as a traditional deck
  • Strong Connection: A through-fastened deck offers the highest level of board-to-joist connection and deck racking strength
  • Cost Effective: Less expensive than virtually any other hidden fastening system
  • Fully Tested: All Cortex components have been fully tested and are guaranteed
  • Made in the USA


DecksDirect # 5260

Cortex Concealed Fastening System Installation Instructions (123 KB) 

Cortex Concealed Fastening System Brochure (594 KB) 

FastenMaster Guarantee of Performance (123 KB) 

Drive TypeTORX® ttap®
Head TypeTrim
Screw Length2-1/2 in
Screw Size#8
ColorsAntique Leather, Ashwood, Dark Roast, Driftwood, Espresso, Mocha, Pecan, Storm Gray Tigerwood, and Whitewash Cedar
Material TypeSteel with 3 layer epoxy coating
Pack Size224 pack
Coverage Estimate224 piece box: 100 linear ft at 12 in on center
Included Accessories(224) #8 x 2-1/2 in screws, (300) plugs, and (2) Cortex setting tools
WarrantyFastenMaster Guarantee of Performance
OtherMade in the USA!
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