Building Materials

Cortex Hidden Fastening System for Decking

The Cortex Hidden Fastening System skillfully hides fasteners in composite, capstock, and PVC decking boards. Cortex offers a strong connection between the deck board and joist. It hides fasteners across the entire deck, first and last board, perimeter and stairs. Cortex is available in a 100 lineal foot package, a 100 square foot package and a 300 square foot package. All screws, plugs, and setting tools are included in every box.

Cortex is available from FastenMaster for the following decking brands in these packaging sizes:

  • Trex Select® (100 lineal foot and 300 sq ft)

  • Trex Transcend® (100 lineal foot and 300 sq ft)

  • Trex Enhance (100 lineal foot and 300 sq ft)

Cortex Hidden Fastener for PVC Trim

The Cortex Hidden Fastening System for PVC Trim brilliantly hides fasteners in PVC trim used for everything from windows on the outside of the home to fascia board and riser boards.

Cortex Driller: Hidden Fastening System for Steel Deck Framing

Cortex Driller Hidden Fastening System expertly hides the heads of fasteners on deck boards used on steel deck framing. Perfect for use on perimeter boards, stairs and breaker boards to create a completely hidden fastened deck.

FlatLOK Structural Wood Screw

FlatLOK is a multi-purpose structural wood screw that can be used for fastening multi-ply LVL, girder trusses, and treated lumber. The flat head allows for easy finishing including drywall or trim.

HeadLOK Structural Wood Screw

HeadLOK is a heavy-duty structural wood screw ideal for many wood applications including deck framing, stair stringers, attaching rigid foam (SIPs), and fences.

LedgerLOK Structural Wood Screw

LedgerLOK is a code-compliant structural wood screw engineered to fasten a deck ledger board to the rim joist of a house without predrilling.

TimberLOK Structural Wood Screw

TimberLOK is a heavy-duty wood screw for applications such as attaching rafter or trusses to the top plate, landscape timbers, fences, decks, headers, and stair stringers.  ThruLOK Through-Bolt Replacement

The ThruLOK Through-Bolt Replacement system can be used for applications including multi-ply beams, deck posts, and carrying beams.

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