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Azek/Timbertech Cortex Hidden Fasteners - 100SF

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Cortex Concealed Fasteners for Azek and Timbertech

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The Cortex Concealed Fasten Master System

The Cortex Concealed Fasten Master System for Azek and Timbertech is the most innovative, and complete system used to hide the heads of your deck screws, using plugs that match your deck's color exactly.

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Free Shipping Available

On any combination of select items over $99

Excluding Alaska and Hawaii. Conditions Apply

  • Minimum Order Tier: $99
  • Note: Free shipping only applies to combined product totals of the same Minimum Order Tier. Learn More

Priority Shipping Available

Ships to Alaska, Hawaii, and many US Territories.

Great Money Saving Tip

Save money by making your own plugs with the Irwin 1/4" Plug Cutter!

The Cortex Concealed Fasten Master System for Azek and Timbertech is the most innovative, and complete system used to hide the heads of your deck screws, using plugs that match your deck's color. The Cortex concealed Fasteners consists of a screw, a setting tool and a plug from the same board material. Cortex hidden fasteners have been redesigned with a new thread design requiring less torque, and a new bit made from stronger material for extreme pro contractor use that uses the Torx TTAP head. The TTAP head makes it almost impossible to strip the fasteners, allowing for easy removal, and a stability button keeps the screw straight when drilling. Setting Tool included in every box.

Azek & TimberTech Cortex Fastening System:

  • Each Cortex plug has been engineered and tested to yield ultimate long term performance. This testing includes:
    • UV Stability/Long Term Weathering Tested
    • Intense Freeze-Thaw Cycle Tested
    • Expansion/Contraction Cycle Tested
    • Moisture Saturation/Freezing Performance Tested
    • Impact Resistant
    • Recommended by Azek and The Deck Store Installers
    • 8 x 2-1/2" Screws except the White which are 2-3/4"

Cortex Box Contents:

  • TimberTech Cortex 100 Linear Foot Box Contains 224 Screws, 300 Plugs, & 2 Bits
  • Azek Cortex 100 Square Foot Box Contains 350 Screws, 400 Plugs, & 2 Bits
  • Azek Cortex 300 Square Foot Box Contains 1050 Screws, 1200 Plugs, & 6 Bits
  • Azek Cortex White 50 Linear Foot Box Contains 75 Screws, 100 Plugs, & 1 Bit
  • Azek Cortex White 250 Linear Foot Box Contains 375 Screws, 400 Plugs, & 3 Bits
  • Azek Cortex White 750 Linear Foot Box Contains 1125 Screws, 1200 Plugs, & 6 Bits

Typical Deck Coverage – based on 5.5" board width and 16" O.C. joist spacing

WARRANTY - Please visit or call FastenMaster at 800 518 3569 for a full written warranty. For technical assistance or questions regarding proper use of this system, please contact FastenMaster Technical Support at 800 518 3569 or visit

Package Quantity Depending on selection - 100lf pack contains 224 screws / 300 plugs | 100sq ft pack contains 350 screws / 400 plugs | 300sq ft pack contains 1050 screws / 1200 plugs | plus bits
Manufacturer FastenMaster
Manufacturer Link
Dimensions #8 x 2-1/2" Screws
Color Acacia, Brownstone, Coastline, Cypress, Dark Hickory, English Walnut, Hazelwood, Kona, Mahogany, Slate Gray, Weathered Teak, White, Amazon Mist, Antiqua Gold, Antique Leather, Antique Palm, Ashwood, Caribbean Redwood, Cedar, Dark Roast, Dark Teak, Driftwood, Espresso, Gray, Mocha, Pecan, Sapele, Storm Gray, Tigerwood, Whitewash Cedar
CA Proposition 65 Warning

FastenMaster Hidden Deck Fasteners

FastenMaster is a brand of task specific contractor quality fasteners engineered to enable a PRO to complete a project Faster, Easier, Stronger.

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  1. Exactly what I needed review by DIANE on 10/12/2021
    Overall Product Rating

    The Cortex Concealed Fasteners came quickly and were exactly what I needed, matches my deck perfectly. Would order again from The Deck Store.

  2. Great service review by Rebecca on 8/18/2021
    Overall Product Rating

    These were on back order everywhere. Not here and shipped within 5 business days. Will definitely order again!

  3. Very Saridfied review by Don on 10/6/2020
    Overall Product Rating

    Easy ordering, reliable delivery

  4. Awesome experience review by Jeffrey on 9/3/2020
    Overall Product Rating

    The deckstoreonline saved our project. I wish we had bought the decking from them too. We ordered Azek decking from a local store and had to switch color choices twice because delivery of the product was repeatedly delayed thus delaying our half finished deck project. Eventually timber tech told me to find another local retailer of Azek, which I did and we ended with yet another color choice but at least it was going to be delivered. However, that retailer failed to include the matching plugs needed for the deck installation and told us it would take four more weeks. I called timber tech again and they were no help and referred me to the plug manufacturer who was also no help either.

    I then found deckstoreonline who, miraculously was able to get us the matching plugs in a matter of days. Literally, we were facing another month’s delay (already weeks behind) had it not been for the deckstoreonline.

    HIGHLY RECOMMEND and will use again in the future when the need arises.

  5. Excellent product, great service review by Francis on 6/20/2020
    Overall Product Rating

    I was familiar with the product from previous uses, but the speed and accuracy of the service provided by the deck store was truly first rate, had what I needed, received it before I needed it, and got the job done fast...

  6. First time use review by Christopher on 10/22/2019
    Overall Product Rating

    First time using these screws & plugs. Prefer them to the hidden clips. Like that the screws allow to adjust height of decking. Also plugs took less time installing than anticipated.

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