Simpson 12d x 3-1/4" 20 deg.-22 deg. Collated Ring-Shank Nail in Type 316 Stainless Steel (11 Gauge) by Simpson Strong-Tie is engineered for wood framing and wood-to-wood fastening applications where superior withdrawal resistance and long-term corrosion protection are essential. The annular-ring shank locks into wood fibers to resist pull-out forces, while the Type 316 stainless steel construction delivers outstanding performance in coastal, saltwater, and chemically challenging environments. Designed for use with pneumatic framing nailers, these plastic-strip collated nails streamline installation and reduce driving effort on the job site.

Key Features

• Type 316 Stainless Steel material - provides superior corrosion resistance for seaside, wet, and chemically aggressive environments where standard fasteners would fail prematurely.
• Annular-ring (ring-shank) shank - increases withdrawal resistance by locking into wood fibers, delivering a more secure attachment than smooth-shank alternatives in framing and structural applications.
• 20 deg.-22 deg. plastic-strip collation - compatible with many major manufacturers' pneumatic framing nailers, speeding up installation and reducing operator fatigue on large projects.
• Full round head with checkered pattern - the checker design blends with wood grain, reduces sunlight glare, and accepts surface finishes for a cleaner finished appearance.
• Diamond point tip - provides clean, precise entry into wood, reducing splitting and improving driving efficiency.
• 11 gauge, 0.120" shank diameter - delivers the shank strength required for structural framing and wood-to-wood fastening in demanding construction conditions.
• 3-1/4" length (12d penny size) - sized for full-depth penetration through dimensional lumber, ensuring code-appropriate engagement in framing connections.

Why This Product

• The Type 316 stainless steel finish is the right choice for coastal construction, dock framing, and any application where exposure to salt air, moisture, or chemicals would degrade a standard galvanized or bright-finish nail over time.
• The annular-ring shank directly addresses pull-out failure - a critical concern in structural wood framing - by mechanically interlocking with wood fibers rather than relying solely on friction.
• The 20 deg.-22 deg. plastic-strip format is compatible with many major pneumatic framing nailers on the market, meaning fewer tool compatibility issues and faster setup when switching nail stock on site.
• The checkered full round head accepts surface finishes and reduces glare, making these collated nails a practical choice for finish-sensitive framing work where exposed fastener heads need to blend with the surrounding wood surface.

Specifications

• Brand: Simpson Strong-Tie
• Penny Size: 12d
• Length: 3-1/4 in.
• Gauge: 11
• Shank Diameter: 0.120 in.
• Head Diameter: 9/32 in.
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Pattern: Checkered
• Point Type: Diamond Point
• Collation Angle: 20 deg.-22 deg.
• Collation Type: Plastic Strip
• Material/Finish: Type 316 Stainless Steel
• Country of Origin: United States

Available Pack Options

• T11A325CNJ: 1000 Pk
• T11A325CNB: 4000 Pk

Approved Applications

• Framing - Wood
• Fastening Wood-to-Wood

Frequently Asked Questions

What makes Type 316 stainless steel different from other nail finishes?

Type 316 stainless steel offers superior corrosion resistance compared to standard galvanized or bright finishes. It is particularly well-suited for seaside and coastal applications where exposure to salt air and moisture would degrade other materials, and it also performs well in environments with chemical exposure.

Are these nails compatible with my pneumatic framing nailer?

These nails use a 20 deg.-22 deg. plastic-strip collation format that is compatible with many major manufacturers' pneumatic tools. For a complete list of verified compatible tools, refer to the Tool Compatibility Matrix linked in the Downloads section below. If your specific tool model is not listed, you can Contact us and a sales professional will assist with fastener selection.

Why does the head have a checkered pattern instead of a smooth surface?

The checkered (checker) head pattern on this full round head nail is designed to blend with wood grain, reduce sunlight glare, and accept surface finishes. This makes the fastener a practical choice for applications where exposed nail heads need to be visually unobtrusive or will receive a paint or stain finish.

What is the benefit of an annular-ring shank over a smooth shank?

The annular-ring (ring-shank) design features rings along the shank that mechanically interlock with wood fibers as the nail is driven. This increases withdrawal resistance - meaning the nail resists being pulled back out - providing a more secure attachment compared to smooth-shank nails of the same diameter and length. This is especially important in structural wood framing applications.

Downloads and Resources

• Tool Compatibility Matrix

Note: Product dimensions may differ from picture.