Our strongest hidden fastener system provides a clean look, using a high quality, ACQ approved, specialty deck screw with a TORX ttap drive system. The best hidden fastener for stairs and perimeter boards. Covers approximately 100LF based on 12″ OC spacing of joists.

Included:

• 224 carbon steel screws
• 300 plugs
• 2 driver bits

Fastener remains hidden because the included plug is made from TimberTech decking and color-matched to all TimberTech Composite collections.*

*Cortex not compatible with scalloped Terrain, Prime+, and Prime Collection boards

Predrilling is required when installing Cortex with any uncapped or capped composite deck board. It is recommended to use a 7/32 drill bit to pilot a hole halfway through the deck board but not into the framing.