Simpson 8d x 2-1/2" Annular Ring Shank Roofing Nail in 304 Stainless Steel is engineered for roofing professionals who need both superior holding power and long-term corrosion resistance. Designed by Simpson Strong-Tie, these stainless steel roofing nails deliver reliable fastening performance in demanding outdoor environments, including coastal, high-humidity, and chemically aggressive conditions where standard nails would deteriorate over time.

Key Features

• Type 304 stainless steel construction - provides superior corrosion resistance compared to plain steel or galvanized options, making these nails well-suited for exposed roofing applications and environments with elevated moisture, salt air, or chemical exposure.
• Annular ring shank design - the ring-threaded shank dramatically increases withdrawal resistance, locking the nail firmly into wood members and plywood roof decks to reduce the risk of fastener pull-through over time.
• Full round head with 0.375" head diameter - the large, flat bearing surface spreads clamping force across roofing materials, firmly securing shingles, tiles, and slates without tearing through the surface.
• 2-1/2" length (10 gauge, 8d penny size) - sized to penetrate roof decking adequately for thicker roofing materials including tiles and slates, providing the embedment depth needed for a structurally sound connection.
• 0.131" shank diameter - a 10-gauge shank balances structural strength with ease of driving, reducing splitting risk in plywood decks and wood substrates.
• Diamond point tip - the precision-formed point guides the nail cleanly into the substrate, reducing the effort needed to start each fastener and minimizing surface damage to roofing materials.
• Smooth full round head pattern - the clean head face seats flush against roofing material without catching or lifting edges, contributing to a neat, professional finish.
• Made in the United States - domestic manufacturing supports consistent quality control and reliable dimensional accuracy across every nail.

Why This Product

• Corrosion resistance where it matters most - Type 304 stainless steel is a proven material choice for outdoor fasteners exposed to moisture, rain, and salt-laden air, helping roofing assemblies maintain their structural integrity without rust staining or fastener degradation over years of service.
• Engineered to resist pull-out - the annular ring shank mechanically interlocks with wood fibers, making these nails significantly harder to withdraw than smooth-shank alternatives and reducing the chance of fastener loosening due to wind uplift or thermal cycling.
• Trusted Simpson Strong-Tie quality - Simpson is a recognized name in structural fasteners and connectors, and these roofing nails reflect the same commitment to dimensional accuracy and consistent performance found across the Simpson product line.
• Suitable for tile and slate installations - at 2-1/2" in length, these nails are appropriately sized for thicker roofing materials such as concrete or clay tile and natural slate, where longer fastener penetration is required for a secure hold.

Specifications

• Brand: Simpson Strong-Tie
• Nail Type: Roofing Nail
• Shank Type: Annular-Ring Shank
• Material/Coating: Type 304 Stainless Steel
• Penny Size: 8d
• Length: 2-1/2 in.
• Head Diameter: 0.375 in.
• Shank Diameter: 0.131 in.
• Gauge: 10
• Head Type: Full Round Head
• Head Pattern: Smooth
• Point Type: Diamond Point
• Approx. Count per Lb.: 91
• Country of Origin: United States

Available Pack Options

• S810ARN1: 1 Lb
• S810ARN5: 5 Lb
• S810ARNB: 25 Lb

Frequently Asked Questions

What makes the annular ring shank better than a smooth shank for roofing applications?

The annular ring shank features a series of rings along the nail body that mechanically interlock with surrounding wood fibers as the nail is driven. This increases withdrawal resistance significantly compared to a smooth-shank nail, which is especially important in roofing where wind uplift forces and repeated thermal expansion and contraction can work fasteners loose over time. The result is a more secure, longer-lasting attachment to plywood roof decks and wood structural members.

Is Type 304 stainless steel appropriate for coastal or high-humidity roofing environments?

Type 304 stainless steel provides strong corrosion resistance and performs well in outdoor roofing applications where moisture, humidity, and mild salt-air exposure are concerns. This material helps prevent rust staining on roofing materials and maintains fastener strength over years of service in challenging environments. For extremely aggressive marine or high-chloride environments, consulting the tile or roofing manufacturer's fastener specifications is always recommended.

What types of roofing materials are these nails designed for?

These 2-1/2" roofing nails are well-suited for installing thicker roofing materials such as concrete tile, clay tile, and natural slate, where greater fastener length and withdrawal resistance are needed. They are also appropriate for standard asphalt shingle installations on plywood or wood-plank roof decks. Always refer to the tile or roofing material manufacturer's recommendations for specific fastener requirements before beginning installation.

How many nails are there per pound?

There are approximately 91 nails per pound for this 8d x 2-1/2" annular ring shank roofing nail in 304 stainless steel. This count can help with estimating how much material you need for a given roofing project when purchasing by weight or in bulk quantities.

Note: Product dimensions may differ from picture. Dimensions may differ from picture.