The Simpson 2-1/4 in. 15 deg. Wire Coil Ring-Shank Siding Nail, Full Round Head, 13 Ga, Type 316 Stainless Steel (1,800-Qty) is a collated fastener from Simpson engineered for fast, reliable attachment of fiber cement siding boards. The 15 deg. wire-coil format is compatible with many major manufacturers' pneumatic tools, reducing driving force and increasing installation speed on the job site. Built from Type 316 stainless steel with an annular ring shank, this nail delivers the grip and corrosion resistance demanded by coastal and seaside environments where long-term siding performance is non-negotiable.

Key Features

• Ideal for fiber cement board installation - purpose-designed to meet the fastening requirements of fiber cement siding without damaging the panel surface during driving.
• Checkered head pattern - blends with wood grain, reduces glare from sunlight, and accepts surface finishes so nail heads remain discreet after installation.
• Generous underhead fillet - allows nails to be driven flush or countersunk without crushing the surrounding material, giving installers precise control over finished depth.
• Annular ring shank - increases withdrawal resistance to provide a secure attachment that reduces cupping of siding boards over time, keeping the facade flat and stable.
• Slender 13-gauge body with diamond point - makes driving easier and cleaner, minimizing splitting in wood substrates and reducing fatigue during high-volume installation.
• Type 316 stainless steel construction - provides superior corrosion resistance compared to standard stainless grades, making this nail well-suited for seaside applications and prolonged exposure to salt air and moisture.
• 15 deg. wire-coil collation - compatible with many major manufacturers' pneumatic nailers for efficient, high-speed fastening that keeps projects moving.

Why This Product

• Built for coastal conditions - Type 316 stainless steel offers superior resistance to salt air, moisture, and the corrosive environments that cause standard fasteners to fail prematurely, making this nail a dependable long-term choice for seaside siding projects.
• Engineered to keep siding flat - the annular ring shank's increased withdrawal resistance actively works against board cupping, a common problem with siding installations that lesser fasteners cannot adequately prevent.
• Designed for production-speed installation - the 15 deg. wire-coil format works with many major manufacturers' pneumatic tools, and the slender gauge with diamond point reduces driving resistance so crews can work faster with less effort.
• Finish-friendly head design - the checkered head pattern accepts surface finishes and blends with wood grain, while the generous underhead fillet prevents surface damage when driving flush or countersinking, resulting in a cleaner, more professional finished appearance.

Specifications

• MPN: T13A225SNJ
• Brand: Simpson Strong-Tie
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Gauge: 13
• Length: 2-1/4 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
• Fiber cement board installation

Frequently Asked Questions

What type of material are these siding nails made from, and why does it matter?

These nails are made from Type 316 stainless steel, which provides superior corrosion resistance compared to standard stainless grades. This makes them especially well-suited for seaside and coastal applications where exposure to salt air and moisture would cause lesser fasteners to corrode and fail over time.

Are these nails compatible with standard pneumatic nailers?

Yes. The 15 deg. wire-coil collation format is compatible with many major manufacturers' pneumatic tools, allowing for efficient, high-speed installation that reduces driving force compared to hand-nailing.

Why is the annular ring shank beneficial for siding installation?

The annular ring shank increases withdrawal resistance, which means the nails grip the substrate more securely once driven. This provides a secure attachment that helps reduce cupping of siding boards over time - an important performance characteristic for long-term siding integrity.

Can these nails be driven flush or countersunk without damaging the surrounding material?

Yes. The generous underhead fillet on these nails is specifically designed to allow them to be driven flush or countersunk without crushing the surrounding wood, helping to maintain a clean, professional finish on the siding surface.

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