Simpson 8d x 2-1/2" 15 deg. Wire Coil Full Round Head Ring-Shank Nail in Type 316 Stainless Steel is a premium collated framing and decking nail engineered by Simpson Strong-Tie for demanding structural and outdoor applications. Built from Type 316 stainless steel, this 12-gauge nail delivers outstanding corrosion resistance in coastal, seaside, and chemically exposed environments where standard galvanized fasteners would fail. The annular ring shank design bites deep into wood fibers, dramatically increasing withdrawal resistance so connections stay tight and secure over time. With a 15 deg. wire-coil collation format, these nails are compatible with many major manufacturers' pneumatic coil nailers, making high-volume framing and decking installation faster and more efficient.

Key Features

• Type 316 Stainless Steel material - provides superior corrosion resistance compared to standard stainless options, making it the right choice for seaside applications, saltwater exposure, and chemically harsh outdoor environments.
• Annular ring shank (ring shank type) - the ridged shank profile locks into wood grain and significantly increases withdrawal resistance, resulting in a more secure attachment that resists pull-out under load.
• 15 deg. wire-coil collation - compatible with many major manufacturers' pneumatic coil nailers, reducing driving force and increasing installation speed on large framing and decking projects.
• Full round head with checkered pattern - the full round head maximizes bearing surface area for stronger hold, while the checkered face blends with wood grain, reduces sunlight glare, and accepts surface finishes for a cleaner finished look.
• Diamond point tip - drives cleanly and accurately through wood, minimizing splitting even in dense or dry lumber.
• 12-gauge wire diameter with 0.099" shank - provides the shank strength needed for structural framing connections while maintaining compatibility with a broad range of pneumatic coil tools.
• 8d penny size at 2-1/2" length - a standard framing and decking nail length that meets common code requirements for structural connections and deck fastening applications.

Why This Product

• Engineered for coastal and corrosive environments - Type 316 stainless steel outperforms Type 304 and galvanized coatings in saltwater and chemically aggressive settings, making this nail a dependable choice for oceanside decks and structures exposed to moisture and salt air.
• Ring shank design means fasteners stay put - standard smooth-shank nails can back out over time with wood movement; the annular ring shank resists withdrawal, keeping structural connections intact and reducing callbacks or repairs.
• Speeds up installation without sacrificing strength - wire-coil collation at a 15 deg. angle reduces driving force requirements and feeds smoothly through pneumatic nailers, cutting installation time on large framing or decking jobs compared to hand-nailing or strip-nail formats.
• Broad pneumatic tool compatibility - the 15 deg. wire-coil format works with many leading pneumatic coil nailer brands, so you are not locked into a single tool system on the job site.

Specifications

• Brand: Simpson Strong-Tie
• Penny Size: 8d
• Length: 2-1/2 in.
• Gauge: 12
• Shank Diameter: 0.099 in.
• Shank Type: Annular-Ring Shank
• Head Diameter: 1/4 in.
• Head Type: Full Round Head
• Head Pattern: Checkered
• Point Type: Diamond Point
• Collation Type: Wire Coil
• Collation Angle: 15 deg.
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel

Available Pack Options

• T12A250PNJ: 1800 Pk
• T12A250PNB: 3600 Pk

Frequently Asked Questions

What makes Type 316 stainless steel a better choice than standard stainless or galvanized nails for outdoor projects?

Type 316 stainless steel contains molybdenum, which provides superior resistance to saltwater, chlorides, and chemicals compared to galvanized or Type 304 stainless options. It is specifically recommended for seaside and coastal applications where standard fasteners are prone to premature corrosion and staining.

What is an annular ring shank and why does it matter for framing or decking connections?

An annular ring shank - also called a ring shank - features a series of ridges along the nail body that interlock with wood fibers as the nail is driven. This significantly increases withdrawal resistance compared to a smooth-shank nail, keeping structural connections secure even as wood expands, contracts, or is subjected to load over time.

What pneumatic nailers are compatible with these 15 deg. wire-coil nails?

These nails are compatible with many major manufacturers' pneumatic coil nailers that accept 15 deg. wire-coil collation. For a full list of compatible tool models, refer to the Tool Compatibility Matrix in the Downloads section below, or contact us and a sales professional will assist with fastener selection.

What is the significance of the checkered head pattern on these nails?

The checkered pattern on the full round head serves three practical purposes: it blends visually with wood grain for a cleaner appearance, reduces glare from sunlight during outdoor installation, and accepts surface finishes so the fastener can be painted or stained to match the surrounding material.

Downloads and Resources

• Tool Compatibility Matrix

Note: Product dimensions may differ from picture.