FastenMaster Cortex for TimberTech Decking - 100 Linear Feet
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Cortex Concealed Fastening System for TimberTech Decking

100 linear feet of coverage

Each box includes 224 screws, 300 plugs and 2 set screws

Conceals fasteners for the entire deck, including first and last boards, perimeter and stairs

Plugs are made from TimberTech deck boards, ensuring plugs match the decking

Conceals the heads of deck screws

Strong connection between deck boards and joists


Cortex Concealed Fastening System for TimberTech Decking is a fast and easy way to conceal fasteners and screw heads when installing TimberTech 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.


Manufacturer FastenMaster
Brand FastenMaster
Sub Brand Cortex
Compatible Materials TimberTech Decking
Coverage (Linear Feet) 100
Finish Epoxy-Coated
Installation Tools Required Drill with a 1/2” Chuck either Corded or Battery Powered of at Least 18 Volts
Material Carbon Steel Screws / TimberTech Deck Board Plugs
Number of Plugs 300
Number of Screws 224
Package Includes (224) Screws, (300) Plugs, (2) Setting Tools
Recommended Spacing 16" OC or Closer
Recommended Use Hidden Deck Fastening
Screw Drive Type TORX ttap
Screw Size #9

Weights and Dimensions

Weight (Pounds) 3
Length (Inches) 2.5


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