Simpson 12d x 3-1/4" 20 deg.-22 deg. Collated Ring-Shank Nail in Type 304 Stainless Steel by Simpson Strong-Tie is engineered for professional framing and structural fastening applications where holding power and corrosion resistance are critical. This 11-gauge, full-round-head nail features an annular-ring shank that dramatically increases withdrawal resistance compared to smooth-shank alternatives, keeping connections tight even under load and seasonal movement. Packaged in 20 deg.-22 deg. plastic-strip collation, these nails load quickly into pneumatic framing nailers, allowing crews to drive fasteners faster and with less physical effort on the job site. The Type 304 stainless steel construction provides reliable protection against rust and oxidation, making these nails well-suited for outdoor structures, coastal builds, and applications involving moisture-exposed framing lumber.

Key Features

• Type 304 Stainless Steel material - resists rust and corrosion in outdoor, moisture-exposed, and chemically treated lumber environments, extending the service life of the fastened connection
• Annular-ring shank - dramatically increases withdrawal resistance compared to smooth-shank nails, locking the fastener in place and maintaining a secure attachment over time
• 20 deg.-22 deg. plastic-strip collation - compatible with many major manufacturers' pneumatic framing nailers, reducing hand fatigue and significantly speeding up installation
• Full round head with checkered pattern - maximizes bearing surface for code-compliant connections, while the checker pattern blends with wood grain, reduces sunlight glare, and accepts surface finishes
• Diamond point tip - pierces lumber cleanly and consistently, reducing splitting and enabling accurate placement
• 11-gauge, 0.120" shank diameter - provides the structural mass needed for demanding framing applications without overdriving into the material
• 9/32" head diameter - delivers a broad, full bearing surface that distributes load and meets structural fastening requirements
• Made in the United States - domestically produced to consistent quality standards expected for structural fastener applications

Why This Product

• Built for corrosive environments: The Type 304 stainless steel finish goes beyond standard galvanized coatings, offering robust resistance to rust and oxidation - a practical choice for exterior framing, decking substructures, and lumber exposed to moisture or weather.
• Holds tighter than smooth-shank nails: The annular-ring shank bites into wood fibers as the nail is driven, creating a mechanical lock that resists pullout forces - ideal for structural framing connections where holding strength matters.
• Speeds up pneumatic nailing workflows: The 20 deg.-22 deg. plastic-strip format loads fast and works with many common pneumatic framing nailers, cutting down reload time and keeping the installation pace consistent across large projects.
• Head design works for finish-sensitive applications: The checkered head pattern blends visually with wood grain and accepts surface finishes, making this nail useful not just for hidden structural work but also for applications where nail heads may be visible or painted over.

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
• Finish: Type 304 Stainless Steel
• Material: Type 304 Stainless Steel
• Country of Origin: United States

Available Pack Options

• S11A325CNJ: 1000 Pk
• S11A325CNB: 4000 Pk

Frequently Asked Questions

What type of pneumatic nailers are compatible with these collated nails?

These nails use 20 deg.-22 deg. plastic-strip collation and are compatible with many major manufacturers' pneumatic framing nailers designed for that collation angle. For a full list of compatible tool models, refer to the Tool Compatibility Matrix available in the Downloads section below.

Why choose an annular-ring shank over a smooth-shank nail for framing?

The annular-ring shank creates a mechanical interlock with wood fibers as the nail is driven, substantially increasing withdrawal resistance compared to smooth-shank nails. This makes ring-shank nails a preferred choice for structural connections where the fastened members may experience lateral load, vibration, or seasonal wood movement.

What does the checkered head pattern do?

The checkered pattern on the full-round head serves three practical purposes: it blends visually with wood grain so nail heads are less conspicuous, it reduces sunlight glare on exposed surfaces, and it accepts surface finishes such as paint or stain - making these nails suitable for both hidden structural framing and finish-sensitive applications.

Is Type 304 stainless steel appropriate for outdoor and moisture-exposed framing applications?

Yes. Type 304 stainless steel provides strong resistance to rust and corrosion, making these nails well-suited for exterior framing, decking structures, and connections in lumber exposed to moisture or the elements. For seaside or highly corrosive environments, Simpson also offers a Type 316 stainless steel option for superior corrosion resistance.

Downloads and Resources

• Tool Compatibility Matrix

Note: Product dimensions may differ from picture.