FastenMaster Cortex for Trex Decking - 100 Linear Feet

Quick ID: Q14306

from $80.97

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Helpful HintFind Cortex for Trex Enhance scalloped deck boards here.


  • 100 linear feet of coverage
  • Each box includes 224 screws, 300 plugs and 2 setting tools
  • Conceals fasteners for the entire deck, including first and last boards, breaker boards, perimeter and stairs
  • Plugs are made Trex deck boards, ensuring plugs match the decking
  • No pre-drilling needed
  • Strong connection between deck boards and joists
  • Galvanized screws ACQ approved; corrosion resistant
  • New thread design reduces installation torque and dramatically increases fastener strength
  • Screw length of 2.5"
  • Plug dimensions of .25" in diameter and .3" deep


Cortex Concealed Fastening System for Trex Decking is a fast and easy way to conceal fasteners and screw heads when installing Trex decking boards. The FastenMaster Cortex box includes everything needed, including 224 screws, 300 plugs and 2 setting tools. FastenMaster recommends installing with an 18 volt cordless impact drill.

How many fasteners are needed? Horizontal trim boards less than 12" wide, use two Cortex fasteners at every framing member - rafter tail or wall stud. The screws should be 16" OC or closer. Vertical trim boards (i.e., next to a door or a window), use two Cortex fasteners every 16" OC or closer. If a trim board is 12" or wider, use three screws. Each trim board must be fastened within two inches of the end of each board.

Note: Predrilling is not required throughout the majority of the project. Predrilling is required when fastening within 1/2" of the end of a board and at mitered joints. Use a 3/16" drill bit for predrilled pilot holes.


Sub BrandCortex
Compatible MaterialsTrex Decking
Coverage (Linear Feet)100
Installation Tools RequiredDrill with a 1/2” Chuck either Corded or Battery Powered of at Least 18 Volts
MaterialCarbon Steel Screws / Trex Deck Board Plugs
Number of Plugs300
Number of Screws224
Package Includes(224) Screws, (300) Plugs, (2) Setting Tools
Recommended Spacing16" OC or Closer
Recommended UseHidden Deck Fastening
Screw Drive TypeTORX ttap
Screw Size#9
ThreadingDual Lead
Threads Per Inch12

Weights and Dimensions

Length (Inches)2.5

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