Simpson 3d x 1-1/4" Annular Ring Shank Box Nail in 304 Stainless Steel is a precision-engineered fastener from Simpson designed for demanding wood construction applications where corrosion resistance and superior holding power are essential. The annular ring shank design dramatically increases withdrawal resistance compared to smooth shank nails, making these stainless steel box nails an ideal choice for decking, siding, fencing, and other exterior wood assemblies exposed to moisture and weathering. Crafted from Type 304 stainless steel, these nails deliver reliable, long-lasting performance in residential and light commercial construction where rust-free fastening is a priority.

Key Features

• Type 304 stainless steel construction - resists rust and corrosion in outdoor, humid, and moisture-prone environments, extending the life of the fastened assembly without staining or degrading surrounding wood
• Annular ring shank design - significantly increases withdrawal resistance compared to smooth shank nails, creating a more secure, durable connection that holds tight under load and over time
• Checkered head pattern - blends naturally with wood grain, reduces sunlight glare, and accepts surface finishes, giving finished projects a cleaner, more professional appearance
• Full round head profile - provides maximum bearing surface against the wood, distributing load effectively and reducing the risk of the nail pulling through
• Diamond point tip - enables smooth, consistent nail driving with reduced splitting in wood members, improving installation efficiency and reducing material waste
• 14 gauge, 3d penny size at 1-1/4" length - a versatile box nail dimension suited to lighter wood assemblies and applications where a finer shank helps prevent wood splitting
• Recommended by ANSI/AF&PA Permanent Wood Foundations Design Specifications - confirms suitability for permanent structural wood foundation construction, giving builders confidence in code-recognized performance

Why This Product

• Built for lasting outdoor performance - Type 304 stainless steel resists the corrosion, rust, and staining that can compromise fastener integrity and wood appearance in exterior and moisture-exposed installations
• Superior grip where smooth nails fall short - the annular ring shank provides significantly higher withdrawal resistance than standard smooth shank nails, making this the right choice when connection security and long-term holding power matter
• Finish-friendly for visible surfaces - the checkered head pattern reduces glare and accepts stains, paints, and surface finishes, making these nails well-suited for decking, trim, and siding applications where aesthetics count
• Code-recognized for permanent foundations - stainless steel nails like these are recommended by the ANSI/AF&PA Permanent Wood Foundations Design Specifications, supporting use in demanding structural applications that require verified fastener performance

Specifications

• Brand: Simpson Strong-Tie
• Material: Type 304 Stainless Steel
• Penny Size: 3d
• Length: 1-1/4 in.
• Gauge: 14
• Shank Diameter: 0.083 in.
• Head Diameter: 2/9 in.
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Pattern: Checkered
• Point Type: Diamond Point
• Approx. Count per Lb.: 473
• Country of Origin: United States

Available Pack Options

• S3ABN1: 1 Lb (473)
• S3ABN5: 5 Lb (2365)
• S3ABNB: 25 Lb (11825)

Frequently Asked Questions

What is the difference between Type 304 and Type 316 stainless steel for these nails?

Type 304 stainless steel offers excellent corrosion resistance for most outdoor and moisture-exposed wood construction applications. Type 316 stainless steel provides superior corrosion resistance and is specifically recommended for seaside or coastal applications where saltwater exposure is a concern. If your project is near the ocean or in a highly corrosive marine environment, Type 316 is the preferred choice.

Why choose an annular ring shank nail over a smooth shank nail?

The annular ring shank features rings along the shank that grip the surrounding wood fibers, significantly increasing withdrawal resistance compared to a smooth shank nail. This means the nail holds tighter over time and is far less likely to back out under load, vibration, or seasonal wood movement - making it the better choice for decking, siding, and other applications where connection integrity is critical.

Are these stainless steel nails compatible with pressure-treated lumber?

Yes. Stainless steel nails are among the fastener types recommended for use with pressure-treated lumber because they resist the corrosive compounds present in treated wood. Type 304 stainless steel provides corrosion resistance suitable for most treated lumber applications, helping prevent the staining and fastener degradation that can occur with non-stainless fasteners.

Can the checkered head finish be painted or stained?

Yes. The checkered pattern on the nail head is specifically designed to accept surface finishes including paints and stains, allowing the nail head to blend in with the finished appearance of the surrounding wood. This makes these nails a practical choice for visible exterior surfaces such as decking boards, siding, and trim where a clean, finished look is desired.

Note: Product dimensions may differ from picture. Please see item description for specifications.