Simpson #8 x 1-5/8" Bugle-Head Wood Deck Screw with Square Drive in Type 305 Stainless Steel is a heavy-duty exterior fastener engineered by Simpson Strong-Tie for dependable, corrosion-resistant performance in outdoor wood decking applications. Designed to work with cedar, redwood, and preservative-treated lumber, this stainless steel deck screw delivers a secure, flush-finished connection that holds up against the elements - giving your deck, patio, or outdoor structure the same lasting strength you expect from interior construction.

Key Features

• Type 305 Stainless Steel material - provides strong corrosion resistance for outdoor and pressure-treated wood applications, keeping fasteners intact season after season
• Bugle head design with 0.340" head diameter - countersinks flush with the decking surface for a clean, professional finish without the need for additional countersinking steps
• #2 Square drive - delivers better bit engagement and reduced cam-out compared to Phillips-style drives, making installation faster and more controlled
• Type-17 point - self-drilling tip bores into wood quickly for fast starts without pre-drilling in most applications, saving time on large decking projects
• Coarse thread pattern - draws decking material tightly and securely to the substrate, reducing gaps and movement between boards over time
• #8 screw size at 1-5/8" length - sized appropriately for attaching deck boards to joists, providing sufficient thread engagement without over-penetrating thinner framing members
• Compatible with cedar, redwood, and preservative-treated woods - a versatile fastener that handles the most common exterior decking materials without special preparation in most cases

Why This Product

• The Type 305 Stainless Steel construction resists rust and corrosion in outdoor environments, making these screws a reliable long-term fastening solution for wood decks exposed to moisture, rain, and humidity.
• The Type-17 self-drilling point and coarse threads work together to pull deck boards tight to joists efficiently - reducing installation time and the likelihood of board gaps or loosening over time.
• The bugle head countersinks flush into the wood surface automatically, eliminating the need for a separate countersinking step and producing a smooth, snag-free deck surface.
• The included #2 square driver bit means you have everything needed to get started right away - no separate trip to find the correct bit size for square-drive installation.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #8
• Length: 1-5/8 in.
• Head Type: Bugle Head
• Head Diameter: 0.340 in.
• Drive Type: #2 Square
• Thread Type: Coarse Threads
• Point Type: Type-17 Point
• Material/Finish: Type 305 Stainless Steel
• Approx. Count Per Lb.: 150
• Country of Origin: Taiwan

Available Pack Options

• S08162DB1: 1 Lb - includes #2 square driver bit included (replacement bit model BIT2S-2-R2)
• S08162DB5: 5 Lb - includes #2 square driver bit included (replacement bit model BIT2S-2-R2)
• S08162DBM: 1000 Pk - includes #2 square driver bit included (replacement bit model BIT2S-2-R2)
• S08162DBB: 4000 Pk - includes #2 square driver bit included (replacement bit model BIT2S-2-R2)

Approved Applications

• Fastening Wood-to-Wood
• Decks - Deck Boards Wood

Frequently Asked Questions

Can these screws be used with preservative-treated lumber?

Yes. These screws are specifically designed for fastening all types of wood decking, including cedar, redwood, and preservative-treated woods. The Type 305 Stainless Steel material provides the corrosion resistance needed when in contact with treated lumber chemicals in outdoor environments.

Do I need to pre-drill before installing these screws?

The Type-17 point is engineered for fast starts and can self-drill into wood in most decking applications. However, pre-drilling is recommended near board ends to help prevent wood splitting, particularly with harder or denser wood species.

What drive bit do I need for installation?

These screws use a #2 Square drive. A #2 square driver bit is included with each package. If you need a replacement bit, the compatible model is the BIT2S-2-R2.

What is the difference between Type 305 and Type 316 stainless steel for deck screws?

These screws are made from Type 305 Stainless Steel, which provides strong corrosion resistance suitable for most outdoor decking applications. For seaside or marine environments where exposure to saltwater and more aggressive corrosive conditions is expected, a Type 316 stainless steel option may be more appropriate for superior corrosion resistance.