Overview

The GRK Fasteners RT Composite Trim Screw, item 16079-GRK (specifically a #8 x 2-1/2" size, often found in Pro-Paks of 605 count), is a specially designed fastener optimized for attaching composite and cellular PVC trim materials. This innovative screw ensures a clean, professional finish by preventing "mushrooming" and allowing the screw head to disappear seamlessly beneath the surface.

This screw features a reverse threading under the head, which actively clears out material to create a flush seating for the trim head without causing dimpling or swelling. Combined with GRK's signature Zip-Tip™ for one-step installation without pre-drilling, and W-Cut™ threads for reduced driving torque, the RT Composite Trim Screw offers exceptional ease of use and superior results. Its Climatek™ coating provides AC257 code-approved corrosion resistance, making it suitable for both interior and exterior applications, including use in treated lumber.

Key Features

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  Reverse Thread Design: Prevents mushrooming and helps the trim head seat cleanly and disappear into composite and cellular PVC materials.
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  Trim Head: Provides a very small, clean finished look ideal for visible trim applications.
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  Zip-Tip™: Allows for one-step installation with no pre-drilling required in most materials.
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  W-Cut™ Threads: Reduces driving torque for faster and easier installation, minimizing material splitting.
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  Recessed Star Drive (T-10): Eliminates stripping for improved productivity and a secure drive.
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  Climatek™ Coating: AC257 code approved for superior corrosion resistance in both interior and exterior environments, including treated lumber.
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  High Strength Steel: Made from case hardened steel for high tensile, torque, and shear strength.
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  Building Code Approved: ESR-3201 approved for structural applications, ensuring compliance and reliability.