Cortex Concealed Fastening System

How It Works

Deck Screws with Setting Tool: Special deck screws are driven vertically through the deck board into the framing using a Cortex setting tool. This tool helps set both the fastener and prepare a hole for the plug all in one step.

Color-Matched Plugs: After the screws are installed, matching plugs (made from decking material or close match) are inserted to conceal the screw heads, blending in with the deck surface.

Universal Use: Cortex fasteners are designed for a variety of decking materials — including PVC, composite, and capstock boards — and can be used across the full deck surface, including first/last boards, edges, and stairs.

Drive System: Many Cortex screws use a TORX® ttap driving system, which reduces cam-out (slipping) and makes installation smoother for both pros and DIYers.

Benefits of Using Cortex

• Clean, professional look: Fasteners are nearly invisible once plugs are installed.
• Stronger connection: The screw pulls boards down firmly into the joists.
• Compatible with many decking brands: Works with major brands like AZEK, TimberTech, Trex, Fiberon, and more, with plugs matched to specific colors.
• Faster install: Collated plugs (on strips) can speed up the work compared to individual plugs.

The Cortex hidden fastening system is the fastest, easiest way to hide the heads of your deck screws on most leading brands of deck board types. Simple and easy to use, just set the screw, set the plug, and you’re all set. Cortex deck fasteners offer a strong face-mount connection between the deck board and joist. It hides fasteners across the entire deck, first and last board, perimeter, and stairs. We carry Cortex for the following brands: Azek - TimberTech. They are available in a 100-square-foot package and a 300-square-foot package. All screws, plugs, and setting tools are included in every box.

Cortex for Azek Trim

The FastenMaster Cortex Concealed Fastening System is the fastest, easiest way to conceal the fastener heads when installing PVC trim boards.  No more caulking, sanding, or painting needed. Available in Azek white only. Smooth and grained boards. Azek fasteners now available in collated and paintable options.

Cortex now comes with the following product enhancements:

TORX® ttap® Drive System: This system is almost impossible to strip-out. In addition, the stability button keeps the fastener straight through installation.
Modified Fastener: New thread design reduces installation torque and dramatically increases fastener strength. Length moves from 2 ½”.
Stronger Setting Tool: Optimized for extreme pro contractor use. Stronger bit material and industrial grade felt will enable you to install 350 fasteners on one Cortex Setting Tool.

Read Less