Simpson 4d x 1-1/2" Annular Ring Shank Box Nail in 316 Stainless Steel is a premium fastener engineered for demanding outdoor, coastal, and moisture-prone construction applications. Built by Simpson from Type 316 stainless steel, this 14-gauge box nail delivers outstanding corrosion resistance in saltwater environments and chemical exposure scenarios where standard fasteners fall short. The annular ring shank design provides a mechanical grip that significantly increases withdrawal resistance compared to smooth-shank alternatives, making it a dependable choice for permanent wood foundations, deck construction, and seaside building projects where long-term holding power is essential.

Key Features

• Type 316 stainless steel construction - provides superior corrosion resistance in saltwater, coastal, and chemically aggressive environments where Type 304 may be insufficient
• Annular ring shank - the ring pattern mechanically locks into wood fiber, increasing withdrawal resistance and keeping fasteners firmly in place under stress, vibration, and seasonal wood movement
• Full round head with checkered pattern - the textured surface blends with wood grain, reduces glare from sunlight, and accepts surface finishes for a cleaner, more professional appearance
• Diamond point tip - drives cleanly and precisely into wood, reducing splitting risk and improving placement accuracy during installation
• 14 gauge, 1-1/2" length (4d penny size) - a compact profile ideal for lighter framing, sheathing, and trim applications where a slender shank minimizes material damage
• Made in the United States - domestic manufacturing supports consistent quality standards and material traceability for code-sensitive construction projects

Why This Product

• Purpose-built for coastal and seaside construction - Type 316 stainless steel is the recommended choice when proximity to saltwater or marine environments would cause carbon steel or lower-grade stainless fasteners to corrode, rust, or stain surrounding materials.
• Meets permanent wood foundation requirements - stainless steel nails of this type are recommended for permanent wood foundation construction per ANSI/AF&PA Permanent Wood Foundations Design Specifications, giving builders confidence in code-sensitive applications.
• Stronger hold than smooth-shank nails - the annular ring shank delivers mechanical withdrawal resistance that keeps connections tight over time, even as wood expands and contracts with seasonal moisture changes.
• Professional finish on exposed surfaces - the checkered head pattern minimizes glare and accepts stains and finishes, making this nail appropriate for visible decking, siding, and trim work where aesthetics matter alongside performance.

Specifications

• Brand: Simpson Strong-Tie
• Coating/Material: Type 316 Stainless Steel
• Gauge: 14
• Penny Size: 4d
• Length: 1-1/2 in.
• Head Diameter: 2/9 in.
• Shank Diameter: 0.083 in.
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Pattern: Checkered
• Point Type: Diamond Point
• Approx. Count per Lb.: 413
• Country of Origin: United States

Available Pack Options

• T4ABN1: 1 Lb (413)
• T4ABN5: 5 Lb (2065)

Frequently Asked Questions

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

Type 316 stainless steel contains molybdenum, which gives it enhanced resistance to saltwater, chlorides, and harsh chemicals compared to Type 304. Simpson specifically recommends Type 316 for seaside applications and environments where superior corrosion resistance is required.

What does the annular ring shank do that a smooth shank cannot?

The annular ring shank features a series of rings along the nail body that grip into the wood fiber as the nail is driven. This creates mechanical resistance to withdrawal forces, resulting in a significantly stronger hold than a smooth-shank nail of the same size - particularly important in applications subject to wind uplift, vibration, or repeated wood movement.

Are these nails suitable for permanent wood foundation construction?

Yes. Stainless steel nails of this type are recommended for the construction of permanent wood foundations in accordance with the ANSI/AF&PA Permanent Wood Foundations Design Specifications.

What does the checkered head pattern provide beyond aesthetics?

The checker pattern on the nail head serves multiple practical purposes: it blends with natural wood grain for a less visible finish, reduces glare from sunlight on exposed surfaces such as decking, and allows the head to accept stains and surface finishes - making these nails well-suited for visible exterior applications.

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