Stainless Steel Composite Deck Screws

  • Metal screw with threading on a white background
    SKU: DCU2C316

    #10 Simpson Strong-Tie DCU Cap Head Composite Deck Screw - 316 Stainless Steel, Painted Heads

    2 Lengths | 14 Colors
    • Ideal for composite decking installations
    • Maximum marine grade corrosion resistance caused by salt, seawater, and chemicals
    Lengths:
    2" 2-3/4"
    Unpainted swatch Brown 01 swatch Brown 05 swatch Gray swatch Gray 01 swatch Gray 04 swatch Red swatch Red 01 swatch Tan swatch Tan 01 swatch Tan 02 swatch Tan 03 swatch Gray 05 swatch Tan 05 swatch
    STARTING AT
    $21.49
  • #10 x 2-1/2" #2 Square Button Head Deck Screw - 305 Stainless Steel, Pkg 2000
    SKU: DKCSS10212

    #2 Square Button Head Deck Screw - 305 Stainless Steel

    2 Lengths
    • Ideal for composite deck applications
    • Resists corrosive effects from chemicals in cedar, redwood, and pressure-treated lumber
    Lengths:
    2-1/2" 3"
    Free Shhipping!
    STARTING AT
    $481.43
    Free Shhipping!
  • #10 x 2-3/4" Simpson Strong-Tie DCU T20 Cap Head Composite Deck Screw - 305 Stainless Steel, Pkg. 70
    SKU: DCU234C305

    #10 x 2-3/4" Simpson Strong-Tie DCU T20 Cap Head Composite Deck Screw - 305 Stainless Steel, Painted Heads

    14 Colors
    • Ideal for composite decking applications
    • Resists corrosive effects from chemicals in cedar, redwood, and pressure-treated lumber
    Unpainted swatch Brown 01 swatch Brown 05 swatch Gray swatch Gray 01 swatch Gray 04 swatch Gray 05 swatch Red swatch Red 01 swatch Tan swatch Tan 01 swatch Tan 02 swatch Tan 03 swatch Tan 05 swatch
    STARTING AT
    $20.64
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Stainless Steel Composite Deck Screws

Stainless steel composite deck screws combine the corrosion resistance of stainless with a head and thread design made specifically for composite materials. These screws prevent mushrooming, reduce surface bulging, and deliver a clean, flush finish, all while standing up to moisture, salt, and harsh outdoor conditions.

Why Choose Stainless Steel for Composite Decking?

Composite decking is an investment, and stainless steel fasteners protect it for the long term. Unlike coated steel screws, stainless won’t rust or stain your deck surface. For coastal, poolside, or high-humidity builds, they’re the best choice for lasting performance.

Features

  • Composite-Specific Design: Trim heads and specialized threads prevent mushrooming in composite boards.
  • Unmatched Corrosion Resistance: Stainless construction eliminates rust and staining.
  • Premium Finish: Flush drive and clean appearance for professional results on visible decking surfaces.

Stainless Composite Screw FAQs

Are stainless screws worth the extra cost for composite decks?

Yes. They protect against staining and corrosion, ensuring your composite deck looks new for decades, especially in coastal or wet environments.

Will these screws work in treated lumber framing?

Absolutely. Stainless steel is compatible with pressure-treated lumber, making these screws safe for attaching composite boards to treated joists.

Do I need 305 or 316 stainless for composite decking?

305 stainless is highly resistant and suitable for most projects. 316 stainless is recommended for marine or seaside decks where salt exposure is extreme.

For more insights, see our guide What are Deck Screws? FAQ or compare Loose vs. Collated Screws for your build.

Further Questions About Stainless Steel Composite Deck Screws

Need help selecting the right stainless fastener for your composite project? Call our Product Experts at (888) 794-1590 or email customerservice@fastenersplus.com, we’ll help you find the perfect fit.

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