Simpson 16d 0.162" x 3-1/2" Preservative-Treated Wood Decking Nail in Type 316 Stainless Steel by Simpson Strong-Tie is engineered specifically for deck boards, docks, and boardwalks where long-term corrosion resistance and holding power are critical. The annular-ring shank bites into both green and seasoned preservative-treated pine to lock boards firmly in place, while the Type 316 stainless steel construction stands up to saltwater exposure, harsh coastal environments, and the corrosive chemistry of pressure-treated lumber - making it the right choice for exterior decking and marine applications where ordinary fasteners fall short.

Key Features

• Type 316 Stainless Steel material - provides superior corrosion resistance compared to standard stainless grades, making these nails suitable for seaside, marine, and wet outdoor environments where salt air and moisture would degrade lesser fasteners.
• Annular-ring shank - the ringed shank profile dramatically increases withdrawal resistance, helping prevent nail heads from popping up over time and keeping deck boards tight through years of seasonal expansion and contraction.
• 16d penny size at 3-1/2" length with 0.162" shank diameter - the larger shank diameter penetrates both green and seasoned preservative-treated pine without splitting, delivering a strong, reliable connection on the first drive.
• Full round head with checkered pattern - the checkered head face blends with natural wood grain texture and reduces glare from direct sunlight, giving finished deck surfaces a clean, professional appearance.
• Diamond point tip - the sharp diamond point starts easily and drives cleanly, reducing installation effort and minimizing the risk of wood splitting at board edges.
• Gauge 8 wire - balanced gauge provides structural holding strength appropriate for deck board fastening without overbuilding, keeping installation straightforward for both professional contractors and DIY builders.
• Made in the United States - domestic manufacturing supports consistent quality control for a fastener that is trusted in structural decking and dock applications.

Why This Product

• Built for the harshest outdoor conditions - Type 316 stainless steel is the go-to material for coastal and marine environments. If your deck or dock is exposed to saltwater spray, sea air, or aggressive preservative-treated lumber chemistry, this nail resists corrosion where standard galvanized or Type 304 stainless options may fail prematurely.
• Keeps boards locked down over time - the annular-ring shank is specifically designed to resist withdrawal forces caused by wood movement, moisture cycling, and heavy foot traffic. Deck boards stay flush and secure rather than developing the raised nail heads that create trip hazards and an uneven surface.
• Engineered for preservative-treated lumber compatibility - the 0.162" shank diameter is sized to drive efficiently into both green (freshly treated) and seasoned pressure-treated pine without pre-drilling, saving time on large decking projects and reducing the chance of wood damage during installation.
• Trusted Simpson Strong-Tie design for deck and dock work - Simpson Strong-Tie formulated this fastener specifically for deck board and dock/boardwalk applications, so installers can select it with confidence knowing it is matched to the exact use case rather than being a general-purpose nail adapted for outdoor use.

Specifications

• Brand: Simpson Strong-Tie
• Finish / Material: Type 316 Stainless Steel
• Penny Size: 16d
• Length: 3-1/2 in.
• Shank Diameter: 0.162 in.
• Shank Type: Annular-Ring Shank
• Gauge: 8
• Head Type: Full Round Head
• Head Diameter: 11/32 in.
• Head Pattern: Checkered
• Point Type: Diamond Point
• Approx. Count per Lb.: 44
• Country of Origin: United States

Available Pack Options

• T16HPTD1: 1 Lb (44)
• T16HPTD5: 5 Lb (220)
• T16HPTDB: 25 Lb (1100)

Approved Applications

• Decks - Deck Boards Wood
• Dock and Boardwalk

Frequently Asked Questions

Why is Type 316 stainless steel recommended for decking and dock nails?

Type 316 stainless steel contains molybdenum, which gives it enhanced resistance to chlorides and the corrosive chemicals found in preservative-treated lumber and saltwater environments. This makes it the preferred choice for seaside decks, docks, and boardwalks where standard fasteners would corrode and stain the wood or fail structurally over time.

What is the benefit of an annular-ring shank on a decking nail?

The annular-ring shank has ridges along its length that grip the surrounding wood fibers and resist withdrawal forces. In decking applications, this means boards are far less likely to develop raised nail heads over time as the wood expands and contracts with seasonal moisture changes - resulting in a safer, longer-lasting surface.

Can these nails be driven into green (freshly treated) pressure-treated lumber?

Yes. The 0.162" shank diameter of this 16d decking nail is specifically sized to allow easy installation into both green and seasoned preservative-treated pine without requiring pre-drilling, which is a common challenge with heavier-gauge fasteners in dense or wet lumber.

What does the checkered head pattern on these nails do?

The checkered pattern on the full round head serves two practical purposes: it blends visually with the natural texture of wood grain so nail heads are less conspicuous on finished deck surfaces, and it reduces glare from direct sunlight, which can be a nuisance on bright days on open decks and docks.

Note: Product dimensions may differ from picture.