Introducing the GRK Fasteners R4 No. 12 & No. 14 x 5-5/8 in. Star Coated W-Cut Multi-Purpose Screws — a heavy‑duty, all‑around fastening solution built for both indoor projects and outdoor applications. This 600‑piece bag brings high‑torque performance, dependable bite, and a clean finish to framing, trim, decking, and more, without the guesswork.
Key features that matter when you’re on the job
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Star drive (Torx) for superior torque and reduced cam-out, so you can drive faster with less stripping, even in dense woods.
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W-Cut thread design provides a strong bite and reliable holding power across a variety of materials, helping you achieve a secure, long‑lasting connection.
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Countersunk head sits flush for a smooth finish on trim, cabinetry, and visible surfaces where a clean look matters.
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Self‑drilling capability minimizes or eliminates the need for pilot holes in many projects, saving time on framing, decking, and interior builds.
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Coated steel construction delivers dependable corrosion resistance for indoor and outdoor use, from damp basements to exterior decks.
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Dual size set includes No. 12 and No. 14 diameters, giving you the flexibility to pair fasteners with different board thicknesses and materials.
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5-5/8 in length provides strong anchoring in thicker boards and structural components while maintaining versatility across common project sizes.
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Bulk packaging in a bagged 600‑count quantity keeps work in progress smoothly stocked for large projects or ongoing maintenance.
Why choose GRK R4 for your project?
- Designed for efficiency, these screws deliver fast, clean driving with a high‑load capacity that you’ll notice on framing, decking, and heavy trim jobs.
- The combination of W-Cut threads and a star drive translates to fewer tool shifts and less effort, letting you focus on accuracy and control.
- Coated steel provides durable corrosion resistance, so outdoor installations — from exterior trim to deck boards — stand up to the elements over time.
- The No. 12 and No. 14 options cover a broad range of material thicknesses and joinery needs, reducing the need to rummage through multiple fastener drawers.
Ideal use cases
- Framing and structural connections in light‑to‑mid‑duty wood projects.
- Decking, stairs, and exterior trim where a flush finish is desirable.
- Cabinetry, furniture assembly, and interior trim where precise torque control matters.
- Weather‑exposed or moisture‑prone environments thanks to the corrosion‑resistant coating.
Practical tips for best results
- For softwoods and composite materials, you’ll typically drive without pre‑drilling; for hardwoods or very dense boards, pre‑drill near edges to prevent splitting and ensure optimal bite.
- Use the star drive to maximize torque transfer and minimize cam‑out, especially when fastening thicker boards or multiple fasteners in close proximity.
- Pair the No. 12 with thinner or lighter boards, and reserve No. 14 for thicker stock or when a stronger joint is required.
