The Simpson Strong-Tie Deck-Drive DCU Composite Screw is designed for composite and PVC decking, trim, and cladding where strength, clean finishes, and durability are a must. Featuring a cap head that prevents mushrooming, these screws ensure a smooth, professional look across all major composite brands. The Quik Guardcoated 316 stainless steel offers dependable corrosion resistance for everything from residential decks to high-exposure and marine environments.

Built for efficiency, the DCU screw features a tri-lobe thread design and unique cut point that penetrate dense composites with ease while minimizing board damage. Inverted upper threads clear away excess material for a flush seat, while a 6-lobe drive provides secure engagement and reduces cam-out. Available in painted head colors to match leading composite decking brands, these screws deliver consistent performance and a seamless finish.

Key Features

• Cap head design – prevents mushrooming for a cleaner, professional finish
• Tri-lobe thread design – reduces composite board damage during installation
• Inverted upper threads – clear excess material for flush seating
• Unique cut point – delivers fast starts in composite, PVC, and HDPE materials
• Color-matched options – available in finishes to blend with major decking brands