The Simpson 2-1/2 in. 15 deg. Wire Coil Ring-Shank Siding Nail in 13 Gauge Type 316 Stainless Steel is engineered for professional siding installations where long-term holding power and corrosion resistance are non-negotiable. Designed by Simpson for use in fiber cement boards and wood siding applications, these full round head nails are collated in a 15 deg. wire-coil format for compatibility with many major manufacturers' pneumatic coil nailers - helping crews drive faster with less effort. From coastal new construction to exterior remodeling in demanding environments, this nail delivers the durability and efficiency that seasoned installers depend on.

Key Features

• Fiber-Cement Board Compatible - purpose-built for use in fiber cement boards, so installers can drive with confidence without risking board damage or fastener failure.
• Checkered Head Pattern - blends with wood grain, reduces glare from sunlight, and accepts surface finishes, resulting in a cleaner, more professional appearance on finished siding.
• Generous Underhead Fillet - allows nails to be driven flush, or countersunk, without crushing surrounding wood, protecting the integrity of the siding material at every fastening point.
• Annular Ring Shank - increases withdrawal resistance to create a secure attachment that reduces cupping of siding boards, maintaining a flat, even surface over the life of the installation.
• Slender 13-Gauge Body with Diamond Point - the slim profile and diamond point work together for easier driving, reducing tool strain and splitting risk in exterior siding substrates.
• Type 316 Stainless Steel Construction - delivers superior corrosion resistance for seaside applications and demanding exterior environments where moisture and salt air accelerate fastener degradation.
• 15 deg. Wire-Coil Collation - compatible with many major manufacturers' pneumatic coil nailers, reducing driving force and increasing installation speed on the job site.

Why This Product

• Built for Coastal and High-Moisture Environments - Type 316 stainless steel is the preferred grade for seaside and exterior applications, offering a higher level of corrosion resistance than standard stainless fasteners, so the connection stays sound long after installation.
• Holds Siding Flat Over Time - the annular ring shank resists withdrawal forces that cause siding boards to cup and warp, making this nail a smart investment for any exterior siding project where long-term aesthetics matter.
• Speeds Up Production Without Sacrificing Quality - the 15 deg. wire-coil format pairs with pneumatic coil nailers to keep crews moving efficiently, while the full round head and underhead fillet ensure every nail seats correctly without damaging the board surface.
• Made in the United States by a Trusted Fastener Brand - Simpson is a recognized name in structural fastening, and these siding nails reflect that standard of quality, giving contractors and homeowners confidence in every coil they load.

Specifications

• Manufacturer Part Number (MPN): T13A250SNJ
• Brand: Simpson Strong-Tie
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Gauge: 13
• Length: 2-1/2 in.
• Head Type: Full Round Head
• Head Diameter: 0.221 in.
• Head Pattern: Checkered
• Shank Type: Annular-Ring Shank
• Shank Diameter: 0.092 in.
• Point Type: Diamond Point
• Collation Type: Wire Coil
• Collation Angle: 15 deg.
• Packaging Quantity: 1,800
• Country of Origin: United States

Approved Applications

• Fastening Wood Siding
• Fastening

Frequently Asked Questions

What type of nailer is compatible with these siding nails?

These nails are collated in a 15 deg. wire-coil configuration and are compatible with many major manufacturers' pneumatic coil nailers that accept 15 deg. wire-coil nails. Always verify your specific tool's collation angle and wire-coil compatibility before use.

Why is Type 316 stainless steel recommended for siding applications?

Type 316 stainless steel provides superior corrosion resistance compared to standard steel fasteners, making these nails an ideal choice for seaside applications and demanding exterior environments where exposure to moisture and salt air is a concern.

What is the benefit of the annular ring shank on these nails?

The annular ring shank increases withdrawal resistance, creating a more secure attachment that helps reduce cupping of siding boards over time - an important advantage for long-term performance in exterior siding installations.

What are the key specifications for this nail?

These nails measure 2-1/2 in. in length with a 13-gauge, 0.092 in. shank diameter and a full round head with a 0.221 in. head diameter. They feature a diamond point for easier driving and come packaged in a quantity of 1,800 nails per box.