Trex 2.5in Cortex Hidden Fastening Screws

Updated August 26, 2026

Condition: NEW FACTORY SEALED Brand: FastenMaster Model: FMCTX-TX75TSSR UPC: 608309446149 The FastenMaster Cortex Hidden Fastening System is the fastest, easiest way to hide fasteners in composite, cap stock, 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 plugs are made with the same material as leading deck boards, meaning you can achieve a perfect seamless finish across your whole deck. Featuring a TORX ttap drive system and a high-strength setting tool Cortex screws are easy to install and optimized for use by the PRO contractor. To install, simply drive the Cortex fastener using the included setting tool this will countersink the screw to the perfect depth. Then, place your Cortex plugs on top of the fastener holes with the grains aligned, and tap to finish. Designed to fasten 50 lineal feet of Trex Transcend Spiced Rum decking. Includes 75, 2-1/2 inch carbon steel Cortex decking screws, 80 Cortex plugs and 1 Cortex setting tool. A winner of the 2022 Home Depot Innovation Award, Cortex is trusted by PROs everywhere who are dedicated to craftsmanship and quality. Drive Style: Torx. Fastener Color: Silver. Fastener Material: Carbon Steel. Fastener Type: Composite Deck Screws. Features: No Additional Features. Head Style: Trim Head. Included: No Additional Items Included. Interior/Exterior: Exterior. Measurement System: Inches. Package Quantity: 75. Product Weight (lb.): 0.95 lb. Screw Head Color: Silver. Thread Style: Coarse Thread. Screw Length: 2-1/2 in. Size: #9. Thread Pitch (mm): 0 mm. Threads Per Inch (TPI): 0. Screw Length: 2-1/2 in. Head Style: Trim Head. Fastener Material: Carbon Steel. Size: #9. Drive Style: Torx. Fastener Type: Composite Deck Screws.

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