Simpson Strong-Tie 8d x 2-1/2" Sienna Painted 15 deg. Wire Coil Ring-Shank Nail in Type 304 Stainless Steel is engineered for roofing professionals who need fast, reliable fastening in asphalt and synthetic slate applications. The annular-ring shank delivers exceptional withdrawal resistance, keeping roofing materials securely in place through years of weather exposure, while the Sienna painted finish helps nail heads blend seamlessly with roofing surfaces for a clean, finished appearance. Wire-coil collation at a 15 deg. angle makes this nail compatible with many major manufacturers' pneumatic coil nailers, dramatically reducing installation time on large roofing projects.

Key Features

• Type 304 Stainless Steel material - provides long-term corrosion resistance in outdoor roofing environments, protecting against rust and degradation even in wet or coastal conditions
• Annular-ring (ring-shank) shank design - increases withdrawal resistance for a secure attachment that helps prevent roofing materials from lifting or shifting over time
• Sienna painted finish - helps nail heads blend with asphalt and synthetic slate roofing materials, maintaining a clean and professional appearance on the finished roof
• 15 deg. wire-coil collation - compatible with many major manufacturers' pneumatic coil nail guns, allowing for faster driving and reduced installation effort on roofing jobs
• Full round head with checkered pattern - maximizes bearing surface on roofing material for a secure hold, while the checkered face reduces glare and improves fastener grip
• Diamond point tip - enables easier penetration into roofing substrates, reducing driving force and helping prevent material splitting
• Slender 13-gauge, 0.092" shank diameter - combined with the diamond point, allows smooth driving into dense roofing decking with minimal effort
• 2-1/2" length (8d penny size) - provides adequate penetration depth for standard roofing deck applications
• Made in the United States - manufactured domestically to consistent quality standards

Why This Product

• Designed specifically for asphalt and synthetic slate roofing - the combination of Sienna painted heads that blend with roofing material and the ring-shank holding power makes this nail purpose-built for roofing applications rather than a generic fastener adapted for the task.
• Stainless steel durability without sacrificing speed - Type 304 stainless steel protects against long-term corrosion while the wire-coil collation and pneumatic compatibility keep installation moving quickly, giving you both performance and longevity in a single fastener.
• Superior holding power from the annular-ring shank - the ring-shank profile grips the substrate more aggressively than a smooth-shank nail, reducing the risk of fastener pull-through or material uplift in wind-driven conditions.
• Broad pneumatic tool compatibility - the 15 deg. wire-coil format works with many major manufacturers' pneumatic coil nailers, so roofing crews can use this nail with the tools they already own without purchasing specialized equipment.

Specifications

• Brand: Simpson Strong-Tie
• Penny Size: 8d
• Length: 2 1/2 in.
• Gauge: 13
• Shank Diameter: 0.092 in.
• Head Diameter: 0.221 in.
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Pattern: Checkered
• Point Type: Diamond Point
• Collation Type: Wire Coil
• Collation Angle: 15 deg.
• Finish: Type 304 Stainless Steel
• Material: Type 304 Stainless Steel
• Color: Sienna
• Country of Origin: United States

Available Pack Options

• S13A250CCSBP: 900 Pk
• S13A250CCS: 3600 Pk

Approved Applications

• Asphalt roofing installation - the ring-shank holding power and painted finish are optimized for this application
• Synthetic slate roofing - the Sienna finish blends with slate-colored roofing products for a professional appearance
• Pneumatic coil nailer roofing work - 15 deg. wire-coil collation supports high-speed installation with compatible tools

Frequently Asked Questions

What makes the ring-shank design better for roofing than a smooth-shank nail?

The annular-ring shank has rings along the shank that grip the surrounding material more aggressively than a smooth shank. This increases withdrawal resistance, meaning the nail is harder to pull out, which helps keep roofing materials securely fastened and reduces the risk of uplift or pull-through over time.

Is Type 304 stainless steel appropriate for roofing applications?

Yes. Type 304 stainless steel provides corrosion resistance suited for outdoor roofing environments where exposure to moisture and weather cycles is constant. The stainless steel material helps ensure the fastener does not rust and weaken over the life of the roof.

What does the 15 deg. wire-coil collation angle mean for tool compatibility?

The 15 deg. angle refers to the angle at which nails are aligned in the coil. This format is compatible with many major manufacturers' pneumatic coil nailers designed for this collation style, allowing roofing professionals to use their existing tools without special adapters.

Why is the nail head painted Sienna instead of left in bare stainless steel?

The Sienna painted finish is specifically chosen to help the nail heads blend with asphalt and synthetic slate roofing materials, which are often brown or terra-cotta toned. This creates a cleaner, more professional finished appearance on the completed roof surface compared to a bright bare-metal head.

Note: Product dimensions and/or thread length may differ from picture.