Azek

Buying Guide: Hidden Deck Fasteners

Choosing a Length
The Cortex range includes a 2.5 in. length and a 2-3/4 in. length. Measure the thickness of your deck boards before ordering so the fastener length suits your build. Check your project plans or the manufacturer's guidance for your board type.

Finish and Application
The Azek Harvest collection offers soft shades that complement the most popular home exterior colors. These fasteners are suited to perimeter boards, stairs and breaker boards, where a hidden fastened deck is the goal. Choose the shade that suits your home's exterior.

Frequently Asked Questions

What does Azek make?
Azek offers hidden deck fasteners with a Torx TTAP star head, sold under the Cortex name in 2.5 in. and 2-3/4 in. lengths. They are made for hidden fastening on decks.

How do I choose the right size?
Measure your deck board thickness and the depth of the framing you are fastening into, then choose the length that suits that build. If you are replacing or matching existing fasteners, check the size printed on the old part first.

Can these fasteners be used on stairs?
These fasteners are suitable for perimeter boards, stairs and breaker boards. Follow the manufacturer's instructions and your local building guidance for stair construction.