Simpson 2d Premium Siding Nail in Type 316 Stainless Steel is engineered by Simpson Strong-Tie for wood siding fastening in demanding outdoor environments where corrosion resistance is critical. At 1 inch in length with a 15-gauge annular-ring shank, this fastener delivers exceptional holding power and long-term durability in severely corrosive conditions - including coastal and seaside applications where saltwater exposure would compromise standard fasteners. Passivated Type 316 stainless steel construction means this siding nail resists the chemical and moisture-driven degradation that shortens the lifespan of exterior fasteners, making it a trusted choice for high-performance wood siding installations.

Key Features

• Passivated Type 316 stainless steel material - enhances corrosion resistance beyond standard stainless grades, making it suitable for seaside and severely corrosive outdoor environments where moisture and salt are constant threats.
• Annular-ring shank design - the rings grip surrounding material and dramatically increase withdrawal resistance compared to smooth-shank nails, providing greater holding power over the life of the siding installation.
• Full round circle head pattern - reduces visible glare on the nail face and accepts surface finishes, helping the fastener blend with painted or stained wood siding for a cleaner finished appearance.
• Diamond point tip - drives straight and true with each strike, reducing the risk of board splitting during installation - especially valuable when working with dense or tight-grained siding materials.
• 15-gauge, 0.072 in. shank diameter - a slender profile minimizes material displacement and reduces splitting while still delivering the structural integrity required for exterior siding fastening.
• 2d penny size, 1 in. length - sized appropriately for thin wood siding panels, ensuring proper penetration depth without over-driving or protruding through the substrate.
• Made in the United States - manufactured domestically to Simpson Strong-Tie quality standards for consistent performance across every fastener.

Why This Product

• Built for coastal and high-exposure environments - Type 316 stainless steel is a step above standard 304 stainless in chloride resistance, meaning this nail holds up where standard exterior fasteners fail due to salt air and moisture - making it the correct specification for seaside siding projects.
• Holds siding more securely over time - the annular-ring shank geometry resists nail pull-through as wood expands and contracts with seasonal moisture changes, reducing siding loosening and callback risk for contractors.
• Reduces board damage during installation - the diamond point drives without deflecting, minimizing splits and cracks in wood siding that can compromise both aesthetics and weather resistance.
• A finish-compatible fastener head - the circle head pattern is designed to accept paint and surface coatings, allowing the nail to be concealed effectively in high-visibility siding applications where appearance matters.

Specifications

• Brand: Simpson Strong-Tie
• Penny Size: 2d
• Length: 1 in.
• Gauge: 15
• Shank Diameter: 0.072 in.
• Head Diameter: 7/32 in.
• Head Type: Full Round Head
• Head Pattern: Circle Head
• Shank Type: Annular-Ring Shank
• Point Type: Diamond Point
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Approx. Count Per Lb.: 530
• Country of Origin: United States

Available Pack Options

• T2KR71: 1 Lb (530)
• T2KR75: 5 Lb (2650)

Approved Applications

• Fastening Wood Siding

Frequently Asked Questions

Why is Type 316 stainless steel specified for siding nails in coastal environments?

Type 316 stainless steel contains molybdenum, which increases its resistance to chlorides and salt-laden air compared to standard stainless grades. Simpson passivates these nails further to reinforce that corrosion resistance, making them the appropriate choice for severely corrosive environments including seaside and waterfront applications where standard fasteners would corrode and fail prematurely.

What is the advantage of an annular-ring shank on a siding nail?

An annular-ring shank features ridges along the length of the nail that grip the surrounding wood fibers and resist withdrawal. This provides greater holding power than a smooth-shank nail - an important quality in exterior siding applications where wood naturally expands and contracts with changes in temperature and humidity, which can gradually work smooth nails loose over time.

Is the diamond point on this nail designed to prevent wood splitting?

Yes. The diamond point geometry helps the nail drive straight and true without deflecting off grain lines in the wood. This accurate entry path reduces the likelihood of splitting the board, which is especially important when fastening thin wood siding panels where a split can compromise both the structural integrity and the weather-resistant function of the siding.

How does the circle head pattern benefit a finished siding installation?

The circle head pattern on this full round head nail is designed to reduce glare on the nail face and to accept surface finishes such as paint or stain. This allows the nail head to be effectively concealed or blended into the finished siding surface, contributing to a cleaner, more professional appearance on exposed exterior cladding.

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