Simpson 8d x 2-1/2" 20-22 Degree Collated Ring-Shank Nail in Type 316 Stainless Steel by Simpson Strong-Tie is engineered for demanding fastening applications where corrosion resistance and holding strength are non-negotiable. This 11-gauge, annular-ring-shank nail is collated in a 20 deg.-22 deg. plastic strip configuration, making it compatible with many major manufacturers' pneumatic framing nailers - so installation stays fast, consistent, and fatigue-reducing for the installer. Whether you're working in coastal environments, around moisture-heavy structures, or wherever seaside air and harsh conditions accelerate fastener failure, the Type 316 stainless steel material provides a level of corrosion resistance suited for those challenging exposures. The full round head with a checkered pattern blends naturally with wood grain, minimizes sunlight glare, and accepts surface finishes cleanly - resulting in a professional appearance on the finished surface.

Key Features

• Type 316 Stainless Steel material - provides superior corrosion resistance for seaside applications, wet environments, and contact with treated lumber where standard fasteners would degrade prematurely.
• Annular-ring shank design - increases withdrawal resistance compared to smooth-shank nails, creating a more secure and durable attachment that resists loosening over time.
• 20 deg.-22 deg. plastic strip collation - reduces driving force and increases installation speed by working smoothly with many major manufacturers' pneumatic nailers, cutting down on hand fatigue during high-volume fastening.
• Full round head with checkered pattern - blends with wood grain and reduces sunlight glare on the surface, while also accepting paint and other surface finishes for a clean, finished look.
• Diamond point tip - enables cleaner nail entry into the workpiece, reducing splitting and improving placement accuracy.
• 11 gauge / 0.120" shank diameter - provides substantial shank strength for structural and framing applications, balancing holding power with pneumatic drivability.
• 9/32" head diameter - delivers adequate bearing surface for secure material-to-material clamping without overdriving into the face of the wood.
• Made in the United States - manufactured domestically to consistent quality standards expected from Simpson Strong-Tie fastener lines.

Why This Product

• Built for coastal and high-moisture environments - Type 316 stainless steel is the recommended material for seaside applications where salt air, humidity, and chemical exposure would corrode lower-grade fasteners. This nail is purpose-built for those demanding conditions.
• Faster installation without sacrificing holding power - the 20 deg.-22 deg. plastic strip collation pairs with pneumatic nail guns from many major manufacturers, meaning you load faster and drive more nails per shift, while the annular ring shank ensures each nail holds firm once seated.
• Finish-ready head for visible surfaces - the checkered full round head is designed to accept surface finishes and blend with wood grain, making this nail a practical choice when the fastened surface will be painted or left exposed to view.
• An 8d / 2-1/2" length that covers common framing and sheathing tasks - the 8d penny size and 2-1/2" length are among the most widely specified nail dimensions in residential and light commercial construction, giving this fastener broad applicability across typical project needs.

Specifications

• Brand: Simpson Strong-Tie
• Penny Size: 8d
• Length: 2-1/2 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
• Finish / Material: Type 316 Stainless Steel
• Country of Origin: United States

Available Pack Options

• T11A250CNJ: 1000 Pk
• T11A250CNB: 4000 Pk

Frequently Asked Questions

What makes Type 316 stainless steel different from standard stainless steel for nails?

Type 316 stainless steel offers superior corrosion resistance compared to more common grades, making it particularly suitable for seaside applications and environments where exposure to salt air, moisture, or harsh chemicals is a concern. Simpson Strong-Tie specifies this material for projects requiring long-term fastener integrity in those conditions.

What pneumatic nailers are compatible with these 20 deg.-22 deg. plastic strip collated nails?

These nails are compatible with many major manufacturers' pneumatic framing nailers designed for 20 deg.-22 deg. plastic strip collation. For a detailed listing of compatible tool models, refer to the Tool Compatibility Matrix linked in the Downloads section below.

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

The annular-ring shank - also called a ring shank or deformed shank - features rings along the shank that grip the surrounding wood fibers as the nail is driven. This significantly increases withdrawal resistance compared to a smooth-shank nail, meaning the nail is much harder to pull out of the material once seated, resulting in a more secure and durable attachment.

Why does the head have a checkered pattern, and does it affect performance?

The checkered head pattern on this full round head nail is designed to blend with wood grain, reduce sunlight glare on exposed surfaces, and accept paint or other surface finishes. This makes it a practical choice for applications where the fastened surface may be finished or left visible after installation, without sacrificing the bearing area provided by the full round head.

Downloads and Resources

• Tool Compatibility Matrix

Note: Product dimensions may differ from picture.