Simpson 8d x 2-1/2" Dark Brown Painted Ring-Shank 15 deg. Wire Coil Nail in Type 304 Stainless Steel is engineered for fast, reliable fastening in roofing and siding applications where both driving efficiency and long-term corrosion resistance are essential. Collated in a 15 deg. wire-coil format, this full-round-head nail is designed for compatibility with many major pneumatic coil nailers, making it a practical choice for professional installers working with asphalt or synthetic slate roofing materials. The dark brown painted finish allows the nail heads to blend naturally with siding and roofing surfaces, reducing the visual impact of exposed fasteners while the annular-ring shank delivers exceptional withdrawal resistance to keep materials securely in place over time.

Key Features

• Type 304 Stainless Steel material - provides durable corrosion resistance for long-term performance in demanding outdoor fastening applications including roofing and wood siding
• Annular-ring shank - significantly increases withdrawal resistance compared to smooth-shank nails, creating a secure attachment that helps prevent cupping and movement in siding boards over time
• 15 deg. wire-coil collation - allows fast, efficient loading and driving with many major manufacturers' pneumatic coil nailers, reducing installation time on large roofing or siding projects
• Dark brown painted finish - helps nail heads blend with asphalt shingles, synthetic slate, and siding materials so fasteners remain low-profile and visually unobtrusive after installation
• Full round head with checkered pattern - checkered surface accepts surface finishes, reduces glare from sunlight, and blends with wood grain for a cleaner finished appearance
• Diamond point tip - penetrates material cleanly and with less resistance, allowing for easier driving and reducing the risk of splitting in trim and siding applications
• Slender 13-gauge, 0.092" shank diameter - reduces driving force required and minimizes material splitting, especially valuable in thinner or more delicate siding and millwork materials
• Made in the United States - domestic manufacturing supports consistent quality standards and reliable material sourcing

Why This Product

• The combination of Type 304 stainless steel construction and a dark brown painted finish makes this nail a purpose-built solution for asphalt and synthetic slate roofing - where both corrosion resistance and a low-visibility head are critical for professional results.
• The annular-ring shank addresses one of the most common problems in siding installation - fastener withdrawal and board cupping - by gripping the surrounding material more aggressively than smooth-shank alternatives, keeping siding flat and secure over years of exposure.
• 15 deg. wire-coil collation paired with broad pneumatic tool compatibility means this nail integrates smoothly into existing jobsite equipment setups, helping crews maintain installation speed without tool-switching or compatibility issues.
• At 2-1/2" length with a 13-gauge profile, this 8d nail provides the penetration depth needed for reliable fastening in roofing and wood siding while the slender gauge reduces the risk of splitting during high-volume pneumatic driving.

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/Material: Type 304 Stainless Steel
• Color: Dark Brown
• Country of Origin: United States

Available Pack Options

• S13A250CCBBP: 900 Pk
• S13A250CCB: 3600 Pk

Approved Applications

• Asphalt and synthetic slate roofing - fast driving with superior holding power and blending finish
• Finishing, millwork, and trim fastening
• Fastening wood siding - annular-ring shank resists withdrawal and reduces board cupping

Frequently Asked Questions

What type of pneumatic nailers is this wire-coil nail compatible with?

This 15 deg. wire-coil nail is compatible with many major manufacturers' pneumatic coil nailers. Always verify your specific tool's angle and collation type requirements before loading to ensure proper fit and safe operation.

Why is an annular-ring shank preferred over a smooth shank for siding and roofing applications?

The annular-ring (also called ring-shank or deformed-shank) design grips the surrounding material more aggressively than a smooth shank. This increased withdrawal resistance helps keep siding boards flat and secure, reducing the risk of cupping, loosening, or movement over time - especially important in applications exposed to seasonal expansion and contraction.

What does the dark brown painted finish on these nails accomplish?

The dark brown painted finish is designed to help the nail heads visually blend with asphalt shingles, synthetic slate roofing, and siding materials. This reduces the visibility of fasteners in the finished installation for a cleaner, more professional appearance. The checkered head pattern further helps by accepting surface finishes and reducing sunlight glare.

Is Type 304 stainless steel appropriate for outdoor roofing and siding fastening?

Yes. Type 304 stainless steel provides corrosion resistance suited for outdoor applications such as roofing and wood siding installation, where fasteners are exposed to moisture and the elements over time. The stainless steel construction is the long-term durability benefit that complements the short-term installation efficiency benefit of the wire-coil collation format.

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