Simpson 12d x 3-1/4" 20 deg.-22 deg. Collated Ring-Shank Nail in Type 316 Stainless Steel is a heavy-duty fastener engineered for demanding outdoor and coastal construction applications where superior corrosion resistance is essential. Manufactured by Simpson Strong-Tie, this 10-gauge annular ring-shank nail delivers increased withdrawal resistance compared to smooth-shank alternatives, making it a reliable choice for framing, decking, and other structural work exposed to saltwater, moisture, and harsh weather. The plastic-strip collation at a 20 deg.-22 deg. angle is compatible with many major manufacturers' pneumatic framing nailers, helping reduce driving force and increase installation speed on the job site.

Key Features

• Type 316 Stainless Steel material - provides superior corrosion resistance in seaside, saltwater, and chemically aggressive environments where standard galvanized fasteners may fail prematurely.
• Annular ring-shank design - increases withdrawal resistance compared to smooth-shank nails, creating a more secure attachment that holds firmly even under load or movement over time.
• 20 deg.-22 deg. plastic-strip collation - compatible with many major manufacturers' pneumatic framing tools, reducing driving force and significantly increasing installation speed versus hand nailing.
• Full round head with checkered pattern - the 9/32" head diameter provides maximum holding strength, while the checker pattern blends with wood grain, reduces sunlight glare, and accepts surface finishes for a cleaner finished appearance.
• Diamond point tip - drives cleanly and accurately into framing lumber, reducing the chance of splitting and improving placement precision.
• 10-gauge, 3-1/4" length (12d penny size) - a standard framing nail dimension that meets requirements for a wide range of structural and general construction applications.
• Made in the United States - domestic manufacturing supports consistent quality standards and reliable supply for professional contractors.

Why This Product

• Built for coastal and marine environments - Type 316 stainless steel is specifically recognized for use in seaside applications, offering a level of corrosion resistance that carbon steel or standard stainless options cannot match in salt air and moisture-heavy conditions.
• Faster, easier installation with pneumatic tools - the 20 deg.-22 deg. plastic-strip collation is designed to work with many major manufacturers' pneumatic nailers, meaning professionals can drive nails rapidly and consistently without switching to specialty equipment.
• Superior hold for structural integrity - the annular ring-shank geometry mechanically locks into the wood fiber upon driving, delivering greater withdrawal resistance than smooth-shank nails - an important advantage in wind-uplift and high-load situations.
• Clean, finished look with no glare - the checkered head pattern is specifically designed to blend with wood grain and reduce sunlight glare, making these nails a practical choice where aesthetics matter alongside structural performance.

Specifications

• Brand: Simpson Strong-Tie
• Penny Size: 12d
• Length: 3-1/4 in.
• Gauge: 10
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Shank Type: Annular-Ring Shank
• Shank Diameter: 0.131 in.
• Head Type: Full Round Head
• Head Diameter: 9/32 in.
• Head Pattern: Checkered
• Point Type: Diamond Point
• Collation Angle: 20 deg.-22 deg.
• Collation Type: Plastic Strip
• Country of Origin: United States

Available Pack Options

• T10A325CNJ: 1000 Pk
• T10A325CNB: 4000 Pk

Frequently Asked Questions

What type of pneumatic nailer is compatible with these collated nails?

These nails feature a 20 deg.-22 deg. plastic-strip collation that is compatible with many major manufacturers' pneumatic framing nailers. For a detailed list of confirmed compatible tool models, refer to the Tool Compatibility Matrix available in the Downloads section below. If you do not see your specific tool model listed, contact us and a sales professional will assist with fastener selection.

Why should I choose Type 316 stainless steel over other nail materials for outdoor use?

Type 316 stainless steel is specifically recommended for seaside applications and environments where superior corrosion resistance is required. Unlike carbon steel or standard stainless options, Type 316 stainless steel holds up against saltwater, moisture, and chemically aggressive conditions - making it an appropriate choice for coastal construction, marine-adjacent structures, and other demanding outdoor applications.

What does the annular ring-shank design do compared to a smooth-shank nail?

The annular ring-shank (also called a ring-shank or ring-grooved shank) creates a mechanical interlock with the wood fiber as the nail is driven. This increases withdrawal resistance - meaning the nail resists being pulled back out under load - compared to a smooth-shank nail of the same length and gauge. This added holding power is particularly valuable in structural framing and applications subject to wind uplift or lateral forces.

What does the checkered head pattern offer beyond standard nail heads?

The checkered head pattern on this full round head nail serves three practical purposes: it blends with natural wood grain for a less conspicuous appearance, reduces sunlight glare on exposed surfaces, and accepts surface finishes such as paint or stain. These qualities make this nail well-suited for finish-conscious applications where the fastener head may be visible after installation.

Downloads and Resources

• Tool Compatibility Matrix

Note: Product dimensions may differ from picture.