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Cortex for Fiberon ArmorGuard Decking - 2-1/2 inch Cortex screws and plugs - Brazilian Walnut (50 LF)

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  • Cortex for Fiberon Decking – Brazilian Walnut
  • 2-1/2 inch Cortex screws and plugs – 50 LF
  • Cortex Hidden Fastening System conceals your deck fasteners
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Product Details

About This Product

The FastenMaster Cortex Hidden Fastening System is the fastest, easiest way to hide fasteners in composite, cap stock, and PVC decking boards. Cortex offers a strong connection between the deck board and joist. It hides fasteners across the entire deck, first and last board, perimeter and stairs.Cortex plugs are made with the same material as leading deck boards, meaning you can achieve a perfect seamless finish across your whole deck. Once installed, Cortex plugs become a part of your deck, expanding and contracting along with the boards around them - this means your plugs will not need to be replaced for the lifetime of the project. Featuring a TORX ttap drive system and a high-strength setting tool - Cortex screws are easy to install and optimized for use by the PRO contractor.To install, simply drive the Cortex fastener using the included setting tool - this will countersink the screw to the perfect depth. Then, place your Cortex plugs on top of the fastener holes with the grains aligned, and tap to finish.Designed to fasten 50 lineal feet of Fiberon ArmorGuard Brazilian Walnut decking. Includes 75, 2-1/2 inch carbon steel Cortex decking screws, 100 Cortex plugs and 1 Cortex setting tool.A winner of the 2022 Home Depot Innovation Award, Cortex is trusted by PROs everywhere who are dedicated to craftsmanship and quality.


  • Compatible with Fiberon ArmorGuard Brazilian Walnut decking
  • 50 lineal feet of coverage - Includes 75, 2-1/2 inch screws, 100 plugs and 1 setting tool
  • Hides fasteners across the entire deck, first and last board, perimeter and stairs
  • Cortex plugs are made from the same material as market-leading deck boards, creating a 100% perfect match every time
  • Cortex screws are made from high-strength carbon steel
  • The TORX ttap Drive System delivers a superior bit engagement for a stable wobble free installation
  • The Cortex setting tool is optimized for the PRO contractor - Stronger bit material and industrial grade felt will enable you to install 350 fasteners with one setting tool
  • Winner of the 2022 Home Depot Innovation Award
  • Warrantied for the life of the project
  • Return Policy

Product Information

Internet # 316100040


Store SKU # 1006211545

Additional Resources

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From the Manufacturer



Screw Length

2-1/2 in



Thread Pitch (mm)

0 mm

Threads Per Inch (TPI)



Drive Style


Fastener Color


Fastener Material

Carbon Steel

Fastener Type

Composite Deck Screws


No Additional Features

Head Style

Hex Head


Driver Bit, Screw



Measurement System


Package Quantity


Product Weight (lb.)

1.06 lb



Screw Head Color


Thread Style

Coarse Thread

Warranty / Certifications

Manufacturer Warranty

FastenMaster® warrantees its fasteners to be free from defects in materials and workmanship for the life of the project. When used as recommended by FastenMaster® and within the manufacturer’s instructions for the materials being attached, the coating and structural performance of these fasteners is covered under the terms of this limited warranty

Questions & Answers

Q:Does this product come in fiberon sand castle color?
by|Apr 18, 2023
1 Answer
Answer This Question

A:  Hi Tyrone, Thank you for reaching out. At this time, the 50lf -75pk Fiberon for Home Depot is only offered in Brazilian Walnut & Nantucket Grey. Have a great day!!

by|Apr 19, 2023
    Q:I?m using UltraShield Naturale Cortes 1 in. x 6 in. x 8 ft. Brazilian Ipe Solid Composite Decking Board. Can I use this Cortex for Fiberon Decking Screws in Brazilian Walnut instead?
    by|Oct 23, 2022
    1 Answer
    Answer This Question

    A:  Hi Edwin, Thank you for your question. The key feature of the Cortex system is that the plugs are cut from the same board that it is going to be used on. It is not a color match system. This guarantees that the color is consistent, and the plugs weather, expand and contract at the same rate as the board. We do not recommend or warrantee using plugs from one brand to be used on another brand. Please feel free to contact Fasten Master @ 800-518-3569 or techsupport@fastenmaster.com if you have any further questions.

    by|Oct 24, 2022
      Showing 1-2 of 2

      Customer Reviews

      4.6 out of 5

      • 4.6 out of 20 reviews
      • 100% recommend this product
      Filter by:
      Showing 1-10 of 20 reviews
      Best way to secure decking quickly and easily
      This is the perfect way to secure decking and hide the attachment points at the same time. The TORX drive system ensures that the bit does not strip out, provided care is taken to drive the screws at right-angles to the surface. The plugs are easy to install and very effectively hide the anchor points for a nice clean installation that matches the surface perfectly.
      • Recommended
      Excellent engineered product
      With Fastermaster trex decking screws you can count on getting a solid deck and not worry about splinter, nail or screw heads. The color matching plug heads cover up the inset screw to give your deck a professional finish. You will notice reverse thread on these screws. These threads are designed to enlarge the hole in the uppermost of two pieces then pull both parts together. Take your time and make sure drill is straight when drilling and installing screw.
      • Recommended
      Hidden screw system
      This fastening system is great for any wood application where you do not want a screw head visible. The package comes with 75 screws, a setting tool and 100 plugs. This particular set has Brazilian Walnut plugs, but they are available in several colors. The set covers about 50 linear feet of decking. The setting tool makes sure that you drill to the exact depth to be able to insert the plug on top of the screw head. The screws are 2-1/2 inches in length. The package set comes with easy installation guidelines.
      • Recommended
      Perfect for deck and patio repairs
      I have a composite deck that was installed several years ago. Over time, composite deck boards shrink and warp similar to regular pressure treated boards, they just don't rot as fast. With a material that last longer, but also moves quite a bit, repairs are very common. I am using the Fastenmaster Cortex screw system to add new decking screws to areas where the boards have become loose. The plugs allow me to add additional screws and cover them up so they're hardly noticeable. The included bit has a felt pad to prevent damage to the deck board and over driving. A very nice feature. The only concern is the bit does not appear to be impact rated so I will only be using a drill.
      • Recommended
      Great product
      i bought the FastenMaster 75-Piece 2.5 in. Cortex for Fiberon Decking Screws in Brazilian Walnut, Browns to replace several brown decking boards on my front patio. I have used this product in the past on axez trim and it looks great and easy to use. The only gripe I would have if any is the for a big project it can be very expensive. I would recommend this product for the ease of use and how good it looks when done.
      • Recommended
      These are great to work with
      The Cortex Hidden Fastening System is the fastest, easiest way to hide fasteners in composite, cap stock, and PVC decking boards. Cortex offers a strong connection between the deck board and joist. It hides fasteners across the entire deck, first and last board, perimeter and stairs. Color: Browns / Tans. New thread design reduces installation torque and dramatically increases fastener strength. Stronger setting tool has been optimized for extreme pro contractor use. Stronger bit material and industrial grade felt will enable you to install 350 fasteners on 1 Cortex setting tool. In addition, the stability button keeps the fastener straight through installation, and the Torx Tap system is almost impossible to strip out.
      • Recommended
      Hidden fastener
      FastenMaster is distributed through a company called OMG which sells many types of fasteners. These particular fasteners are meant for composite decking and are ordered based upon the color/finish of what you are installing. The initial hole through the decking board is drilled the same diameter of the screw, 7/32”. After the fastener is installed below the surface a color coordinated plug is driven into the hole and flush to the decking, therefore hiding the fastener. The driver bit is unique in its design, also.
        • Recommended
        24 found this review helpful
        I gave these three stars because every other one didn’t fit and would flatten instead of fitting into the hole. I abandoned my efforts to use these after 4 or 5 times this happened.
        Response from FastenMaster teamSep 28, 2023
        Plugs "flattening" would be caused by the screws not being driven to the correct depth. The resulting shallow hole can't accommodate the full height of the plug. The #1 reason for a screw not setting deep enough would be failing to predrill the required 7/32 pilot hole before installing the screw. fastenmaster
        • Verified Purchase
        • Verified Purchase
        • Verified Purchase
        Showing 1-10 of 20 reviews