Simpson 16d 0.148" x 3-1/2" Preservative-Treated Wood Decking Nail in Type 304 Stainless Steel by Simpson Strong-Tie is an exterior fastener engineered specifically for deck and dock construction, delivering a corrosion-resistant, long-lasting hold in both green and seasoned preservative-treated pine. The annular-ring shank design dramatically increases withdrawal resistance, helping nail heads stay flush and preventing pop-up over the life of your decking project. Built from Type 304 stainless steel, this 9-gauge nail stands up to the demands of outdoor environments where moisture and treated-lumber chemicals would degrade lesser fasteners.

Key Features

• Type 304 Stainless Steel material - provides strong corrosion resistance in exterior and outdoor environments, protecting the fastener and the surrounding wood for long-term performance in deck and dock applications
• Annular-ring shank - dramatically increases withdrawal resistance compared to smooth-shank nails, helping prevent nail heads from popping up through decking boards over time
• Larger 0.148" shank diameter (9-gauge) - allows for easier penetration into both green and seasoned preservative-treated pine, reducing splitting and driving effort during installation
• Full round head with checkered pattern - the 5/16" head blends with wood grain texture and reduces glare from sunlight, giving decking a cleaner, more finished appearance
• Diamond point - sharp tip makes driving easier and cleaner through dense or treated lumber without pre-drilling
• 16d penny size at 3-1/2" length - a standard framing-compatible length that delivers deep, secure penetration through decking boards into joists and structural members
• Made in the United States - domestic manufacturing supports consistent quality standards for structural fastener applications

Why This Product

• Purpose-built for treated-lumber decking and docks - the combination of annular-ring shank and larger 0.148" diameter shank means this nail was specifically designed to perform in preservative-treated pine, not repurposed from a general-use fastener, reducing the risk of installation problems and long-term failure
• Type 304 stainless steel keeps fasteners functional in wet, outdoor conditions - where standard galvanized nails may corrode over time when exposed to moisture and treatment chemicals, 304 stainless steel provides a corrosion-resistant alternative suited for exterior living spaces built to last
• Checkered head pattern reduces surface glare and blends with wood - a practical aesthetic detail that improves the finished look of a deck without any additional surface treatment, contributing to a cleaner installation outcome
• Withdrawal-resistant shank means less maintenance over time - the annular-ring profile holds tight under seasonal wood movement and foot traffic, reducing the need to re-drive or replace fasteners as the deck ages

Specifications

• Brand: Simpson Strong-Tie
• Material: Type 304 Stainless Steel
• Finish: Type 304 Stainless Steel
• Penny Size: 16d
• Gauge: 9
• Length: 3-1/2 in.
• Shank Diameter: 0.148 in.
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Diameter: 5/16 in.
• Head Pattern: Checkered
• Point Type: Diamond Point
• Approx. Count Per Lb: 56
• Country of Origin: United States

Available Pack Options

• S16PTD1: 1 Lb (56)
• S16PTD5: 5 Lb (280)
• S16PTDB: 25 Lb (1400)

Approved Applications

• Deck construction with preservative-treated pine decking boards
• Dock construction in outdoor and waterside environments
• Fastening green or seasoned preservative-treated lumber
• Exterior decking projects requiring corrosion-resistant fasteners

Frequently Asked Questions

What type of wood is this decking nail designed for?

This nail is designed for use in deck and dock projects with both green and seasoned preservative-treated pine. The larger 0.148" shank diameter allows for easier penetration into this type of dense or moisture-laden lumber without excessive splitting.

What is the difference between Type 304 and Type 316 stainless steel for this type of nail?

Type 304 stainless steel provides strong corrosion resistance suitable for most outdoor decking and dock applications. Type 316 stainless steel offers superior corrosion resistance and is recommended for seaside or coastal applications where exposure to saltwater or more aggressive environmental conditions is a concern.

How does the annular-ring shank help in decking applications?

The annular-ring shank increases withdrawal resistance compared to a smooth shank, which means the nail holds more firmly against the forces that cause nail heads to pop up over time - particularly important in decking where wood movement from moisture and seasonal temperature changes can work fasteners loose.

What does the checkered head pattern on this nail do?

The checkered head pattern on the 5/16" full round head serves two practical purposes: it blends visually with the wood grain texture of decking boards for a cleaner finished appearance, and it reduces glare from direct sunlight on the nail head surface.

Note: Product dimensions may differ from picture.