The Simpson S7ABNB 7d x 2-1/4" Annular Ring Shank Box Nail in Type 304 Stainless Steel is a professional-grade fastener engineered for demanding construction applications where corrosion resistance and superior holding power are essential. Manufactured in the United States, these 25 lb bulk nails feature a 12-gauge annular ring shank that dramatically increases withdrawal resistance compared to smooth-shank alternatives, while the full round checkered head blends naturally with wood surfaces for a clean, finished appearance. Whether you're building permanent wood foundations, decking structures, or exterior assemblies, these stainless steel box nails deliver long-lasting performance you can trust.

Key Features

• Type 304 Stainless Steel Construction - Provides excellent corrosion resistance for exterior and moisture-exposed applications
• Annular Ring Shank - Increases withdrawal resistance to provide a secure, long-lasting attachment in wood substrates
• Checkered Head Pattern - Checker pattern on heads blends with wood grain, reduces glare from sunlight, and accepts surface finishes for a refined appearance
• Full Round Head - Offers maximum bearing surface for superior fastening strength and code compliance in structural applications
• Diamond Point - Ensures clean, easy nail driving with reduced wood splitting
• ANSI/AF&PA Recommended - Stainless-steel nails are recommended for construction of permanent wood foundations by the ANSI/AF&PA Permanent Wood Foundations Design Specifications
• Bulk 25 Lb Packaging - Ideal for high-volume professional projects requiring consistent, job-site-ready supply
• Made in the USA - Domestically manufactured for consistent quality and material integrity

Specifications

• Model Number: S7ABNB
• Coating / Material: Type 304 Stainless Steel
• Gauge: 12
• Penny Size: 7d
• Length: 2-1/4 in.
• Head Diameter: 1/4 in.
• Shank Diameter: 0.113 in.
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Pattern: Checkered
• Point Type: Diamond Point
• Package Quantity: 25 Lb
• Country of Origin: United States

Approved Applications

• Permanent wood foundation construction per ANSI/AF&PA Permanent Wood Foundations Design Specifications
• Exterior wood framing and structural assemblies requiring corrosion-resistant fasteners
• Decking, siding, and trim applications exposed to moisture and weather
• Any construction environment where annular ring shank withdrawal resistance is specified or required
• Projects requiring checkered head nails for reduced glare and surface finish acceptance

What's Included

• Simpson S7ABNB 7d x 2-1/4" Annular Ring Shank Box Nails, Type 304 Stainless Steel - 25 Lb bulk package

Frequently Asked Questions

Why are these nails recommended for permanent wood foundations?

These nails are made from Type 304 stainless steel, which provides excellent corrosion resistance in moisture-exposed environments. The ANSI/AF&PA Permanent Wood Foundations Design Specification recommends stainless steel nails for the construction of permanent wood foundations, making these an appropriate choice for that application.

How does the annular ring shank improve performance compared to smooth-shank nails?

The annular ring shank dramatically increases withdrawal resistance compared to smooth-shank alternatives. This means the nail resists being pulled out of the wood substrate more effectively, resulting in a more secure and long-lasting attachment in structural and exterior assemblies.

What is the purpose of the checkered head pattern on these nails?

The checkered pattern on the full round head serves several practical purposes: it blends with wood grain for a cleaner appearance, reduces glare from sunlight, and accepts surface finishes, giving the finished assembly a more refined look.

What gauge are these nails, and how are they sold?

These are 12-gauge nails measuring 7d x 2-1/4" in length. They are sold in a 25 lb bulk quantity, making them well suited for larger construction projects where a significant volume of fasteners is needed.