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About This Product
The FastenMaster Cortex Hidden Fastening System provides the fastest and easiest way to conceal fasteners in composite, cap stock, and PVC decking boards. It creates a strong, secure connection between deck boards and joists while keeping fasteners hidden across the entire deck—including the first and last boards, perimeter, and stairs.
Cortex plugs are crafted from the same material as leading deck boards, ensuring a seamless, uniform appearance. Once installed, they expand and contract along with the surrounding boards, maintaining a perfect finish for the lifetime of your deck.
Featuring a TORX® ttap® drive system and a high-strength setting tool, Cortex screws are easy to install and optimized for professional use. To install, drive the fastener with the included setting tool to achieve the perfect countersink depth, then place and tap the matching plug for a flawless finish. Designed to fasten 50 lineal feet of Trex Transcend Spiced Rum decking, this system includes 75 2-½ in. carbon steel screws, 80 plugs, and 1 Cortex setting tool. A 2022 Home Depot Innovation Award winner, Cortex is trusted by professionals who value craftsmanship and quality.
Highlights
- Compatible with Trex Transcend Spiced Rum Decking
- Covers 50 Lineal Feet: Includes 75 2-½ in. screws, 80 plugs, and 1 setting tool
- Hidden Fastening System: Conceals fasteners across the entire deck, including perimeter and stairs
- Perfect Match: Plugs made from the same material as leading deck boards for a seamless finish
- Durable Construction: Screws made from high-strength carbon steel
- TORX® ttap® Drive System: Provides stable, wobble-free installation and superior bit engagement
- Professional-Grade Setting Tool: Built with stronger bit material and industrial-grade felt for up to 350 fasteners per tool
- Award-Winning Design: Recipient of the 2022 Home Depot Innovation Award
Dimensions
| Screw Length | 2-1/2 in |
| Size | #9 |
Details
| Drive Style | Torx |
| Fastener Color | Silver |
| Fastener Material | Carbon Steel |
| Fastener Type | Composite Deck Screws |
| Features | No Additional Features |
| Head Style | Trim Head |
| Interior/Exterior | Exterior |
| Measurement System | Inches |
| Package Quantity | 75 |
| Product Weight (lb.) | 0.95 lb |
| Returnable | 30-Day |
| Screw Head Color | Silver |
| Thread Style | Coarse Thread |



