Simpson Strong-Tie 8d x 2-1/2" Tan Painted 15 deg. Wire Coil Ring-Shank Nail in Type 304 Stainless Steel is engineered for professional roofing and siding applications where both installation speed and long-term holding power are essential. This 13-gauge annular-ring shank nail features a full round head with a checkered pattern, a diamond point for easier penetration, and a tan painted finish designed to blend seamlessly with asphalt shingles and synthetic slate roofing materials. Wire-coil collation at 15 deg. makes it compatible with many major manufacturers' pneumatic tools, so contractors can drive fasteners quickly and accurately without sacrificing the corrosion resistance that Type 304 stainless steel provides.

Key Features

• Type 304 Stainless Steel material - delivers long-term corrosion resistance in demanding outdoor roofing and siding environments where moisture and weather exposure are constant concerns.
• Annular-ring (ring-shank) shank design - dramatically increases withdrawal resistance compared to smooth-shank fasteners, providing a secure attachment that helps reduce cupping and movement in siding boards and roofing materials.
• Tan painted finish - blends the nail head with the surrounding material on asphalt and synthetic slate roofing, creating a cleaner, less visible installation with a more finished appearance.
• Checkered head pattern - reduces glare from sunlight, blends with wood grain texture, and accepts surface finishes, making the fastener visually discreet once installed.
• Full round head at 0.221" diameter - provides maximum bearing surface for secure seating and reliable pull-through resistance in roofing and siding substrates.
• 13-gauge / 0.092" shank diameter with diamond point - the slender gauge and sharp point reduce splitting of the substrate and require less driving force, speeding up installation and minimizing material damage.
• 15 deg. wire-coil collation - compatible with many major manufacturers' pneumatic coil nailers, making it easy to integrate into existing tool setups for faster, more efficient job site performance.

Why This Product

• Designed specifically for asphalt and synthetic slate roofing - the combination of a tan painted finish that hides nail heads and an annular-ring shank that locks into roofing material makes this nail purpose-built for roofing applications where aesthetics and holding strength both matter.
• Stainless steel durability in a collated format - most collated roofing nails sacrifice long-term corrosion resistance for convenience; this nail delivers both by combining 15 deg. wire-coil collation with Type 304 stainless steel construction, reducing future fastener failure from rust or oxidation.
• Made in the United States - domestically manufactured to Simpson Strong-Tie's quality standards, giving contractors confidence in consistent dimensions, material integrity, and performance from coil to coil.
• Compatible with a wide range of pneumatic tools - the 15 deg. wire-coil format works with many major manufacturers' nail guns, reducing the need to stock multiple fastener types for different tools on the job site.

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: Tan
• Country of Origin: United States

Available Pack Options

• S13A250CCTBP: 900 Pk
• S13A250CCT: 3600 Pk

Approved Applications

• Asphalt and synthetic slate roofing - fast driving with superior holding power and a color-matched painted finish
• Finishing, millwork, and trim - stainless steel construction resists corrosion and staining in exposed applications
• Fastening wood siding - annular-ring shank reduces board cupping and increases long-term withdrawal resistance

Frequently Asked Questions

What makes an annular-ring shank nail better than a smooth-shank nail for roofing and siding?

The annular-ring (ring-shank) profile on this nail creates mechanical interlock with the surrounding material as it is driven in. This increases withdrawal resistance significantly compared to a smooth-shank nail, which means the fastener resists backing out over time - helping to prevent siding cupping and maintaining a tighter attachment in roofing substrates through seasonal expansion and contraction.

Why is Type 304 stainless steel important for roofing fasteners?

Type 304 stainless steel provides strong corrosion resistance in outdoor environments where fasteners are exposed to moisture, rain, and temperature cycling over many years. Using a stainless steel nail in roofing and siding applications helps ensure the fastener does not rust, stain the surrounding material, or weaken structurally over the long term - making it a sound investment for projects that are difficult to re-access after installation.

What nail guns are compatible with this 15 deg. wire-coil nail?

This nail uses 15 deg. wire-coil collation, which is compatible with many major manufacturers' pneumatic coil nailers. Always confirm your specific tool's accepted collation angle and nail gauge range before loading. Because compatibility spans a wide range of professional-grade tools, this format helps contractors reduce the need to switch between different fastener types on the job site.

What does the tan painted finish do, and will it last outdoors?

The tan painted finish is designed to help the nail head blend visually with asphalt shingles and synthetic slate roofing materials, creating a cleaner finished look once installed. Because the nail body itself is Type 304 stainless steel, the long-term structural integrity of the fastener is not dependent on the paint coating - the stainless steel substrate provides the underlying corrosion protection even in wet outdoor conditions.

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