Simpson 16d Preservative-Treated Wood Decking Nail in Type 316 Stainless Steel from Simpson Strong-Tie is a heavy-duty exterior fastener engineered for deck and dock construction where long-term corrosion resistance and holding strength are critical. At 3-1/2 inches long with a 0.148-inch shank diameter, this 9-gauge ring-shank nail drives cleanly into both green and seasoned preservative-treated pine, delivering a secure, lasting connection in demanding outdoor environments including coastal and waterfront applications.

Key Features

• Type 316 Stainless Steel material - provides superior corrosion resistance against saltwater, chemicals, and harsh outdoor exposure, making it the right choice for seaside and waterfront projects where lesser metals would degrade prematurely.
• Annular-ring shank - dramatically increases withdrawal resistance compared to smooth-shank nails, helping prevent nail heads from backing out and popping up over time, so your deck surface stays flush and safe for years.
• 0.148-inch shank diameter (9 gauge) - the larger shank cross-section provides added strength while still penetrating cleanly into both green and seasoned preservative-treated lumber without splitting.
• 3-1/2-inch length (16d penny size) - delivers deep, full engagement into deck framing members for a structurally sound connection in deck and dock assemblies.
• Full round head with checkered pattern - the 5/16-inch diameter head offers a broad bearing surface to resist pull-through, while the checkered face blends with wood grain texture and reduces glare from sunlight for a cleaner finished appearance.
• Diamond point tip - allows faster, easier driving by concentrating force at entry, reducing the effort required to start the nail and lowering the risk of surface splitting in treated lumber.
• Made in the United States - domestically produced to consistent quality standards, ensuring reliable performance across your project.

Why This Product

• Designed specifically for preservative-treated pine decking and dock construction - the combination of a ring shank and larger 0.148-inch diameter shank addresses the unique challenges of dense, chemical-treated lumber, where standard nails often lose grip over time as the wood cycles through wet and dry conditions.
• Type 316 stainless steel goes beyond standard galvanized protection - where galvanized coatings can react with modern preservative treatments and eventually fail, 316 stainless steel holds up against the chemical compounds in treated wood as well as salt air and standing moisture in coastal and marine environments.
• The annular-ring shank solves one of the most common deck maintenance problems - nail pop. By mechanically locking into the wood fiber, these nails resist the seasonal movement that causes fasteners to work loose, keeping your deck surface flat and professional-looking over the long term.
• The checkered full round head is optimized for exterior decking aesthetics - the textured face grips the wood surface, resists slipping during driving, and minimizes the visual contrast between the nail head and the surrounding wood grain once installed.

Specifications

• Brand: Simpson Strong-Tie
• Penny Size: 16d
• Length: 3-1/2 in.
• Shank Diameter: 0.148 in.
• Gauge: 9
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Diameter: 5/16 in.
• Head Pattern: Checkered
• Point Type: Diamond Point
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Approx. Count Per Lb: 56
• Country of Origin: United States

Available Pack Options

• T16PTD1: 1 Lb (56)
• T16PTD5: 5 Lb (280)
• T16PTDB: 25 Lb (1400)

Approved Applications

• Deck construction with preservative-treated pine lumber
• Dock construction and waterfront structures
• Exterior wood fastening in coastal and marine environments
• Green and seasoned preservative-treated lumber applications

Frequently Asked Questions

Why choose Type 316 stainless steel over standard galvanized nails for treated wood decking?

Type 316 stainless steel offers a higher level of corrosion resistance than standard galvanized finishes, particularly in environments with salt air, moisture, or chemical preservatives used in treated lumber. It is especially recommended for seaside and waterfront applications where galvanized coatings may deteriorate more quickly due to exposure to saltwater and the chemical compounds in modern preservative-treated wood.

What does an annular-ring shank do, and why does it matter for decking?

An annular-ring shank features a series of ridges along the nail body that mechanically interlock with wood fibers as the nail is driven. This greatly increases withdrawal resistance compared to a smooth-shank nail - meaning the nail resists pulling back out as the wood expands and contracts with seasonal temperature and moisture changes. In decking applications, this helps prevent nail-head pop, keeping your deck surface flat and reducing long-term maintenance.

Is this nail compatible with both green and seasoned preservative-treated pine?

Yes. The 0.148-inch shank diameter is specifically designed to penetrate both green (freshly milled, higher moisture content) and seasoned (dried) preservative-treated pine. The diamond point tip further aids in starting the nail cleanly in dense treated lumber without splitting the wood surface.

What is the purpose of the checkered head pattern on this decking nail?

The checkered pattern on the full round head serves two practical purposes. First, it provides a textured surface that grips the wood during driving, helping the nail seat flush without the hammerhead slipping. Second, the texture blends visually with the natural grain of wood decking and reduces glare from sunlight, resulting in a cleaner, less obtrusive appearance once the nail is fully set.

Note: Product dimensions may differ from picture.