Simpson 8d x 2-1/2" Annular Ring Shank Roofing Nail in Type 316 Stainless Steel is engineered for demanding roofing applications where superior holding power and long-term corrosion resistance are essential. Manufactured by Simpson, this full round head roofing nail features an annular ring shank that dramatically increases withdrawal resistance compared to smooth shank fasteners, keeping roofing materials securely anchored to wood members and plywood roof decks even under repeated stress and movement. The diamond point drives cleanly through a variety of roofing substrates, while the large flat head provides broad bearing surface to firmly grip shingles, tiles, and slate without cutting through or damaging the material. Type 316 stainless steel construction delivers exceptional resistance to saltwater, moisture, and corrosive outdoor environments, making these nails a reliable choice for coastal construction, high-humidity regions, and anywhere long-term durability is a priority.

Key Features

• Type 316 Stainless Steel construction - withstands saltwater exposure, moisture, and harsh outdoor environments, reducing the risk of rust staining or fastener failure over time.
• Annular ring shank design - increases withdrawal resistance so roofing materials stay firmly attached to wood members and plywood roof decks under wind uplift and thermal cycling.
• Large full round head (0.375" diameter) - delivers extra bearing surface that secures roofing material without pulling through, reducing the chance of material damage or lift-off.
• 2-1/2" length (8d / 10 gauge) - ideal for installing thicker roofing tiles and slates, providing sufficient penetration depth for a strong, lasting connection.
• Diamond point tip - drives cleanly and accurately through roofing materials, reducing splitting and allowing faster, more precise installation.
• Smooth head pattern - allows consistent, flush driving with a hammer or nail gun without snagging or irregular seating.
• 0.131" shank diameter - sized for the structural demands of roofing applications while maintaining compatibility with standard roofing installation tools.
• Approximately 91 nails per pound - helps estimators and contractors calculate material quantities accurately for roofing projects of any scale.
• Made in the United States - produced domestically to consistent quality standards, supporting project specifications that require US-origin fasteners.

Why This Product

• Built for corrosive environments: Type 316 stainless steel provides a higher level of corrosion resistance than standard galvanized or Type 304 options, making these nails well suited for coastal, marine, and high-moisture roofing applications where fastener longevity is critical.
• Stronger grip than smooth shank nails: The annular ring shank mechanically locks into wood fibers after driving, providing significantly greater withdrawal resistance - an important performance advantage on steep-slope roofs, in high-wind zones, or when securing heavy tile and slate.
• Engineered for tile and slate installation: The 2-1/2" length is specifically suited for thicker roofing materials like tiles and slates, where adequate penetration into the deck is necessary for a code-compliant and structurally sound attachment.
• Simpson quality for fastener-critical applications: Simpson is a recognized name in structural fasteners and connectors, and these roofing nails reflect the dimensional precision and material consistency that roofing professionals rely on for predictable installation results.

Specifications

• Brand: Simpson Strong-Tie
• Material / Coating: Type 316 Stainless Steel
• Penny Size: 8d
• Gauge: 10
• Length: 2-1/2 in.
• Head Diameter: 0.375 in.
• Shank Diameter: 0.131 in.
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Pattern: Smooth Head
• Point Type: Diamond Point
• Approx. Count per Lb.: 91
• Country of Origin: United States

Available Pack Options

• T810ARN1: 1 Lb
• T810ARN5: 5 Lb
• T810ARN10: 10 Lb
• T810ARNB: 25 Lb

Frequently Asked Questions

What is the difference between an annular ring shank and a smooth shank roofing nail?

An annular ring shank features a series of rings along the shank that lock into wood fibers as the nail is driven, creating significantly greater withdrawal resistance compared to a smooth shank nail. This means the nail holds more firmly against forces that would otherwise pull it out - such as wind uplift or the natural expansion and contraction of roofing materials - making it the preferred choice for tile, slate, and other demanding roofing applications.

Why is Type 316 stainless steel recommended for roofing applications?

Type 316 stainless steel contains molybdenum, which enhances its resistance to chlorides and other corrosive elements compared to standard steel or even Type 304 stainless steel. This makes it especially appropriate for coastal environments, saltwater exposure, and high-humidity roofing conditions where corrosion could compromise fastener integrity and lead to staining or premature failure of roofing materials.

Are these nails suitable for installing tile and slate roofing?

Yes. The 2-1/2" length is specifically noted as ideal for installing thicker tiles and slates, as it provides sufficient penetration depth into the roof deck for a secure attachment. When installing tile or slate, always refer to the tile manufacturer's recommendations for nail size, spacing, and installation requirements to ensure proper performance.

What does "approximately 91 nails per pound" mean for project planning?

The approximate count per pound is a helpful reference for estimating how many nails you will need for a given roofing project. By knowing the total number of nails required based on your roofing layout and fastening pattern, you can use this figure to calculate the total weight or quantity needed, helping you order accurately and avoid project delays due to running short on fasteners.

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