Simpson Strong-Tie No. 8 Square Trim Head Deck Screws deliver a durable, professional-grade fastening solution for outdoor decking projects. Crafted from stainless steel and finished with a protective coating, these screws stand up to weather, moisture, and daily wear while maintaining a clean, flush appearance along the deck surface.
Why this screw stands out
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Square drive for confident fastening—the square drive design reduces cam-out and provides easy, twist-resistant driving, even in tougher woods or dense boards.
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Trim head for a neater look—the low-profile trim head sits closer to the surface, helping your deck boards stay flush and your lines crisp and uninterrupted.
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Outdoor-ready stainless steel construction offers corrosion resistance and long-term performance in exterior environments.
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-Coated finish for added protection—a durable coating enhances longevity without compromising driveability or strength.
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1,500-count boxed pack with driver bit included—bulk quantity for large projects and all-in-one convenience.
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Non-collated for precise, hands-on installation—best suited for traditional, straight-down decking layouts where you want full control over each fastener.
Specifications at a glance
- Brand: Simpson Strong-Tie
- Product type: Deck screws
- Size/Callout: No. 8
- Length: 2-1/2 inches
- Material: Stainless steel
- Finish: Coated
- Head style: Trim
- Drive style: Square
- Number in package: 1500
- Packaging: Boxed
- Indoor/Outdoor: Outdoor
- Collated: No
- Driver bit included: Yes
Ideal use cases and who benefits most
- Professional contractors and serious DIYers installing exterior wooden or composite decking boards onto joists where a clean, unobtrusive fastening is key.
- Projects demanding a flush finish with reduced screw visibility to preserve deck aesthetics—and avoid raised screw heads that can catch shoes or tools.
- Large decking jobs where stock reliability matters: a 1,500-piece box keeps you on site longer without constant reordering.
Practical tips for best results
- Use the included driver bit for quick setup and consistent torque.
- Drive screws straight and stop just shy of fully seating to maintain surface flushness and prevent over-penetration.
- Pair these No. 8 screws with appropriate deck boards and joists, and consider balanced spacing to minimize wood movement over time.
- Store the boxed screws in a dry, cool area to preserve the coating and prevent rust accumulation on the head or threads.