Simpson 2-1/2" 8d Annular Ring Shank Common Nail in Type 304 Stainless Steel is a professional-grade fastener engineered by Simpson Strong-Tie for secure wood-to-wood connections and exterior framing applications. Built from 10-gauge, Type 304 stainless steel, this common nail delivers lasting corrosion resistance that stands up to outdoor exposure and moisture-prone environments. The annular ring shank design provides significantly greater withdrawal resistance compared to smooth-shank alternatives, making it a reliable choice for roof sheathing, wood framing, and other demanding structural fastening tasks. Compliant with ASTM F1667 specifications for roof-sheathing ring-shank nails, this fastener meets recognized industry standards for performance and consistency.

Key Features

• Annular ring shank design - increases withdrawal resistance so the nail holds tighter once driven, reducing the risk of fastener back-out in high-stress or load-bearing wood connections.
• Type 304 stainless steel material - resists rust and corrosion in outdoor, damp, and exposed environments, helping exterior structures maintain integrity over time without fastener degradation.
• 10-gauge, 0.131" shank diameter - provides a sturdy, full-bodied fastener profile that handles shear loads in wood framing and sheathing applications without bending under driving force.
• Full round head (9/32" diameter) - delivers maximum bearing surface against the wood face, distributing load evenly and reducing the chance of pull-through in panel and sheathing fastening.
• Diamond point tip - enables smooth, accurate penetration into wood with consistent starting, reducing splitting risk and improving installation speed.
• ASTM F1667 compliant - meets established specifications for roof-sheathing ring-shank nails, so builders and inspectors can rely on documented performance standards.
• Made in the United States - manufactured domestically to consistent quality standards, supporting supply chain reliability for professional contractors.

Why This Product

• Superior holding power for exterior and structural wood connections - the annular ring shank resists withdrawal far more effectively than smooth-shank nails, making this fastener the right call when joints must stay tight under movement, loading, or seasonal wood expansion.
• Corrosion-resistant construction for long-term outdoor performance - Type 304 stainless steel means this nail won't rust and stain the wood surface, a practical advantage in exterior decking, siding, roof sheathing, and other above-grade applications exposed to weather.
• Meets ASTM F1667 for roof sheathing ring-shank nails - when a project calls for code-compliant fasteners in sheathing applications, this nail satisfies that requirement without substitution or guesswork.
• Trusted Simpson Strong-Tie engineering - Simpson's wide fastener line is built to complement their structural connectors and hardware, giving professionals a consistent, tested fastening system across wood framing and exterior living space projects.

Specifications

• Brand: Simpson Strong-Tie
• Penny Size: 8d
• Length: 2-1/2 in.
• Gauge: 10
• Shank Diameter: 0.131 in.
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Diameter: 9/32 in.
• Point Type: Diamond Point
• Material: Type 304 Stainless Steel
• Finish: Type 304 Stainless Steel
• Approx. Count Per Lb: 94
• Compliance: ASTM F1667
• Country of Origin: United States

Available Pack Options

• S8ACN1: 1 Lb (94)
• S8ACN5: 5 Lb (470)
• S8ACNB: 25 Lb (2350)

Approved Applications

• Fastening Wood-to-Wood
• Framing - Wood

Frequently Asked Questions

What makes an annular ring shank nail better than a smooth-shank nail for wood framing?

The annular ring shank features ridges along the nail's body that grip into wood fibers as the nail is driven. This mechanical interlock significantly increases withdrawal resistance compared to a plain smooth shank, meaning the fastener is far harder to pull back out once set. For roof sheathing, wood framing, and other structural connections where joints must resist movement and loading over time, this added holding power is a meaningful performance advantage.

Is Type 304 stainless steel suitable for outdoor and moisture-exposed applications?

Yes. Type 304 stainless steel provides strong corrosion resistance and is well-suited for outdoor construction, general exterior framing, and environments where the fastener will be exposed to moisture, humidity, or weather. Simpson Strong-Tie also offers Type 316 stainless steel in their nail line for seaside or coastal applications where chloride exposure demands even higher corrosion resistance - but for most exterior above-grade uses, Type 304 delivers reliable, long-lasting performance.

Does this nail comply with any recognized fastener standards?

Yes. This nail complies with ASTM F1667, which covers specifications for roof-sheathing ring-shank nails. This means the nail's dimensions, material, and shank geometry conform to a documented industry standard, which can be important for meeting building code requirements or passing inspections on projects that specify ASTM F1667 compliant fasteners.

How many of these nails are in a pound?

There are approximately 94 nails per pound. This figure is useful when estimating quantities needed for a project based on weight. Because the nail is 10 gauge at 2-1/2 inches in length, the per-pound count reflects the solid stainless steel construction - heavier gauge stainless nails will naturally yield a lower count per pound than lighter wire-gauge alternatives.