Simpson 2-1/2" 8d Annular Ring Shank Common Nail in Type 316 Stainless Steel is a high-performance fastener engineered by Simpson Strong-Tie for wood-to-wood connections and framing applications where long-term holding strength and corrosion resistance are essential. The annular ring shank design delivers increased withdrawal resistance compared to smooth-shank nails, creating a more secure, lasting attachment in structural and exterior framing contexts. Built to comply with ASTM F1667 specifications for roof-sheathing ring-shank nails, this 10-gauge nail is a trusted choice for demanding outdoor and coastal construction projects.

Key Features

• Type 316 Stainless Steel material - provides superior corrosion resistance in saltwater, coastal, and harsh outdoor environments where standard fasteners would deteriorate prematurely
• Annular ring shank design - dramatically increases withdrawal resistance over smooth-shank alternatives, keeping joints tight and secure over time in wood framing and sheathing applications
• Full round head, 9/32" diameter - delivers broad bearing surface across the wood face for a firm, flush-seating connection that distributes load effectively
• Diamond point tip - allows the nail to start cleanly and penetrate wood fiber consistently, reducing splitting risk during installation
• 10 gauge / 0.131" shank diameter - provides the structural body needed for reliable common nail performance in framing and sheathing tasks
• ASTM F1667 compliant - meets recognized industry standards for roof-sheathing ring-shank nails, supporting code-required installations with confidence
• Made in the United States - manufactured to consistent quality standards for construction professionals who require dependable fastener performance

Why This Product

• Built for coastal and seaside construction - Type 316 stainless steel is the preferred choice for seaside applications because it resists chloride-induced corrosion that quickly compromises lesser grades of stainless or galvanized fasteners in saltwater-adjacent environments.
• Holds tighter, longer than smooth-shank nails - the annular ring shank mechanically locks into wood fibers, resisting pullout forces that occur over time due to wood movement, settling, and load cycling - making it an ideal fastener for structural wood framing.
• Exterior living spaces that last as long as interior construction - Simpson Strong-Tie designed this nail line specifically to bring interior-grade durability to outdoor applications, giving builders and homeowners confidence that fasteners won't become a maintenance liability.
• A single nail that covers multiple structural needs - suitable for both wood-to-wood fastening and wood framing applications, this common nail reduces the need to stock multiple fastener types for typical residential and commercial construction projects.

Specifications

• Brand: Simpson Strong-Tie
• Penny Size: 8d
• Length: 2-1/2 in.
• Gauge: 10
• Shank Diameter: 0.131 in.
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Diameter: 9/32 in.
• Point Type: Diamond Point
• Material / Finish: Type 316 Stainless Steel
• Approx. Count Per Lb: 94
• Compliance: ASTM F1667
• Country of Origin: United States

Available Pack Options

• T8ACN1: 1 Lb (94)
• T8ACN5: 5 Lb (470)
• T8ACNB: 25 Lb (2350)

Approved Applications

• Fastening Wood-to-Wood
• Framing - Wood

Frequently Asked Questions

What is the difference between Type 316 and Type 304 stainless steel nails, and when should I choose Type 316?

Type 316 stainless steel contains molybdenum, which significantly enhances its resistance to chloride corrosion - making it the preferred option for seaside, coastal, and marine construction environments. Simpson specifically recommends Type 316 for applications where superior corrosion resistance is required, such as structures near saltwater or in highly humid outdoor conditions.

Why does this nail have an annular ring shank instead of a smooth shank?

The annular ring shank increases withdrawal resistance by mechanically interlocking with wood fibers as the nail is driven. This means the nail resists being pulled back out much more effectively than a smooth-shank nail, providing a stronger and more durable connection - particularly important in structural wood framing and roof sheathing applications.

What standard does this nail comply with?

This nail complies with ASTM F1667 specifications for roof-sheathing ring-shank nails. ASTM F1667 is a recognized industry standard that governs the dimensions and performance characteristics of driven fasteners, helping ensure the nail is suitable for code-required and specification-driven construction work.

How many of these nails are in a pound, and how do I estimate quantities for a project?

There are approximately 94 nails per pound for this 2-1/2 in. 10-gauge Type 316 stainless steel annular ring shank nail. You can use this count to estimate how many pounds you need based on your project's fastener schedule - for example, if your plans call for 940 nails, you would need approximately 10 pounds of nails at this gauge and length.