Simpson 3-1/4 in. 12d Annular Ring Shank Common Nail in Type 304 Stainless Steel is a heavy-duty fastener engineered by Simpson Strong-Tie for wood-to-wood framing and exterior construction applications where long-term holding power and corrosion resistance are essential. The annular ring shank design dramatically increases withdrawal resistance compared to smooth-shank nails, delivering a grip that stays secure over time - even in demanding outdoor environments. Compliant with ASTM F1667 specifications for post-frame ring-shank nails, this 9-gauge fastener is a trusted choice for framing professionals and builders who need reliable, code-recognized performance.

Key Features

• Annular ring shank design - increases withdrawal resistance compared to smooth-shank alternatives, so fastened assemblies hold firmly under load, movement, and environmental stress.
• Type 304 stainless steel construction - delivers strong corrosion resistance for exterior and outdoor framing applications, helping structures last as long as interior components.
• 9 gauge, 0.148 in. shank diameter - provides substantial shear strength appropriate for structural wood-to-wood connections and load-bearing framing.
• Full round head, 5/16 in. diameter - offers a broad bearing surface that increases holding capacity and resists pull-through in wood members.
• Diamond point tip - pierces wood cleanly with minimal splitting, making installation faster and reducing material waste.
• ASTM F1667 compliant - meets recognized specifications for post-frame ring-shank nails, supporting use in code-sensitive and engineered construction projects.
• Made in the United States - manufactured domestically to consistent quality standards, supporting reliable performance across structural applications.

Why This Product

• When standard smooth-shank nails aren't enough, the annular ring shank on this common nail provides significantly greater withdrawal resistance - making it the right choice for framing assemblies that need to stay tight under load and seasonal wood movement.
• Type 304 stainless steel construction makes this nail well-suited for exterior framing, decking, and outdoor structures where exposure to moisture would cause standard steel nails to rust and degrade over time.
• ASTM F1667 compliance means this fastener meets a defined, verifiable standard for post-frame ring-shank nails, giving builders and inspectors confidence it qualifies for engineered and code-governed applications.
• With a full round head and diamond point, this nail drives cleanly and holds broadly - reducing the risk of pull-through and wood splitting, which keeps installations cleaner and more structurally sound.

Specifications

• Brand: Simpson Strong-Tie
• Length: 3-1/4 in.
• Penny Size: 12d
• Gauge: 9
• Shank Diameter: 0.148 in.
• Shank Type: Annular-Ring Shank
• Head Diameter: 5/16 in.
• Head Type: Full Round Head
• Point Type: Diamond Point
• Material: Type 304 Stainless Steel
• Finish: Type 304 Stainless Steel
• Approx. Count Per Lb: 60
• Country of Origin: United States

Available Pack Options

• S12ACN1: 1 Lb (60)
• S12ACN5: 5 Lb (300)
• S12ACNB: 25 Lb (1500)

Approved Applications

• Fastening Wood-to-Wood
• Framing - Wood

Frequently Asked Questions

What makes an annular ring shank nail different from a smooth-shank nail?

An annular ring shank features a series of rings along the shank that grip the surrounding wood fibers as the nail is driven. This geometry creates significantly greater withdrawal resistance compared to a smooth-shank nail, meaning the fastener is much harder to pull out once set. For framing and wood-to-wood connections, this translates to a more secure, long-lasting attachment.

Is Type 304 stainless steel appropriate for outdoor and exterior framing applications?

Yes. Type 304 stainless steel provides strong resistance to corrosion from moisture and outdoor exposure, making it a solid choice for exterior framing and outdoor construction. Simpson Strong-Tie specifically positions these nails as exterior fasteners designed to help outdoor structures last as long as interior ones. For seaside or highly corrosive environments, a higher-grade stainless such as Type 316 may be worth considering.

What standard does this nail comply with?

This nail complies with ASTM F1667 specifications for post-frame ring-shank nails. This standard provides a recognized, verifiable benchmark for nail geometry and performance, which is important for engineered construction projects and inspections where code compliance must be documented.

What does the approximate count of 60 nails per pound mean in practice?

The approximate count of 60 nails per pound is a density reference that helps estimators and builders calculate how many nails are needed by weight for a given project. Because these are 9-gauge, 3-1/4 in. stainless steel nails, the count per pound reflects their size and material density. Actual count may vary slightly depending on manufacturing tolerances.