When you’re building or repairing an outdoor deck, you need fasteners that stand up to weather, moisture, and the test of time. The Simpson Strong-Tie No. 10 x 2-1/2 in. Lobe Flat Head Deck Screws deliver rugged stainless performance with a protective coating, giving you a dependable solution for every deck project.
Why these screws stand out
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316 stainless steel with coated finish combines outstanding corrosion resistance with an extra protective layer, making them ideal for outdoor decks, coastal environments, and humid climates.
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Lobe drive designed to maximize torque and minimize cam-out, helping you drive the screws flush every time for a clean, professional finish.
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Flat head seats neatly with the deck surface, reducing protrusions and providing a smooth, attractive deck appearance.
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2-1/2 inch length is purpose-built for securing deck boards to framing while embedding into the joist for secure, lasting hold.
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No. 10 diameter sized for reliable engagement in typical deck lumber, delivering consistent performance across project after project.
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350 screws per box (4.3 lb) give you plenty of fasteners for mid- to large-scale outdoor decks, reducing the need for frequent reorders mid-project.
Ideal uses and practical guidance
These outdoor-oriented deck screws are engineered for attaching deck boards to framing in environments where moisture is a factor. They’re well-suited for pressure-treated lumber, hardwoods, and composite decking when a robust, corrosion-resistant fastener is needed. Because they are Type 316 stainless steel with a protective coating, they excel in coastal settings with salt air, in systems exposed to rain and humidity, or any project where long-term durability matters.
Tips for best results: choose a No. 10 driver with a compatible bit and apply steady, even force to achieve a flush seating without overdriving. If you’re working with hardwoods or dense lumber, consider a light predrill to reduce splitting and ensure consistent seating depth. Always verify that the screw length is appropriate to penetrate into joists while leaving enough bite for the deck board.
Specifications at a glance
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Brand: Simpson Strong-Tie
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Product Type: Deck screws
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Material: Stainless Steel
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Finish: Coated
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Grade: Type 316
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Head Type: Flat
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Length: 2-1/2 in
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Callout Size: No. 10
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Drive Style: Lobe
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Number in Package: 350
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Container Size: 4.3 lb
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Packaging Type: Boxed
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Indoor/Outdoor: Outdoor
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Collated: No
