Simpson 2d Premium Siding Nail in 316 Stainless Steel by Simpson Strong-Tie is engineered for demanding exterior fastening applications where long-term corrosion resistance is critical. At 1 inch in length with a 15-gauge annular-ring shank, this nail is purpose-built for fastening wood siding in severely corrosive environments - including coastal and seaside installations where standard fasteners would quickly degrade. The passivated Type 316 stainless steel construction goes beyond surface-level protection, delivering deep, material-level resistance to salt air, moisture, and harsh outdoor conditions so your siding stays secured for the long haul.

Key Features

• Passivated Type 316 stainless steel material - removes surface iron and maximizes corrosion resistance, making this nail ideal for seaside, coastal, and other severely corrosive exposure environments where ordinary nails would rust or fail prematurely.
• 15-gauge, 1-inch length (2d penny size) - sized specifically for wood siding applications, providing the right balance of holding power and minimal material disruption in thinner cladding profiles.
• Annular-ring shank - the ringed shank bites into surrounding wood fibers, dramatically increasing withdrawal resistance and holding power compared to smooth-shank alternatives - siding stays put even through seasonal wood movement.
• Full round circle head, 5/32-inch diameter - the low-profile circular head reduces visible glare on finished siding surfaces and accepts paint and other surface finishes cleanly, for a polished, professional result.
• Diamond point tip - drives straight and true with each strike, reducing the risk of board splitting during installation - especially valuable when working with premium or tight-grained wood siding materials.
• Made in the United States - manufactured domestically for consistent quality and reliable material specifications on every fastening project.

Why This Product

• Built for the most corrosive environments - Type 316 stainless steel with passivation treatment is the right choice when proximity to saltwater, ocean air, or industrial moisture would cause standard galvanized or lower-grade stainless fasteners to corrode, stain, or weaken over time.
• Annular-ring shank prevents siding creep and pull-through - unlike smooth-shank nails that can work loose as wood expands and contracts, the ring shank locks into place and maintains holding power through years of weather cycles - reducing callbacks and long-term maintenance.
• Circle head design works with finished siding surfaces - the 5/32-inch full round head is engineered to sit cleanly against siding without oversized footprint or glare, and accepts surface finishes so fasteners blend into the final appearance.
• Approximately 807 nails per pound - a high count-per-pound ratio means efficient coverage on large siding projects, letting you plan material quantities accurately and minimize waste.

Specifications

• Brand: Simpson Strong-Tie
• Penny Size: 2d
• Length (in.): 1
• Gauge: 15
• Head Diameter (in.): 5/32
• Head Type: Full Round Head
• Head Pattern: Circle Head
• Shank Diameter (in.): 0.072
• Shank Type: Annular-Ring Shank
• Point Type: Diamond Point
• Finish: Type 316 Stainless Steel
• Material: Type 316 Stainless Steel
• Approx. Count per Lb.: 807
• Country of Origin: United States

Available Pack Options

• T2KR51: 1 Lb (807)
• T2KR55: 5 Lb (4035)
• T2KR5B: 25 Lb (20175)

Approved Applications

• Fastening Wood Siding

Frequently Asked Questions

Why is Type 316 stainless steel recommended for siding in coastal or seaside environments?

Type 316 stainless steel contains a higher molybdenum content than standard 304 stainless, giving it superior resistance to chlorides and salt-laden air found in marine and coastal environments. These nails are also passivated - a process that removes surface contaminants and enhances the natural corrosion-resistant oxide layer - making them well-suited for severely corrosive exposure conditions where other fastener materials would degrade prematurely.

What is an annular-ring shank and why does it matter for siding installation?

An annular-ring shank features a series of rings along the shank that mechanically interlock with wood fibers as the nail is driven. This significantly increases withdrawal resistance compared to a smooth shank, meaning the nail is far more resistant to being pulled out as siding boards expand, contract, and shift with seasonal temperature and moisture changes. The result is a more secure, longer-lasting fastening connection for exterior siding applications.

What does the diamond point on this nail do during installation?

The diamond point is a four-sided tapered tip that allows the nail to drive straight and true, helping guide it cleanly through wood siding material. This point geometry also helps reduce board splitting during installation, which is particularly important when working with fine-grained or premium wood siding where cracking would be cosmetically or structurally problematic.

Will the circle head pattern on this nail accept paint or stain after installation?

Yes. The circle head pattern is specifically designed to reduce glare on finished siding surfaces and to accept surface finishes such as paint or stain. This allows the nail head to blend into the finished appearance of the siding rather than standing out visually, supporting a clean and professional result on exterior wood siding projects.

Note: Product dimensions may differ from picture. Please see the item description above for specifications.