Simpson 3d Wood Siding Nail in Type 316 Stainless Steel by Simpson Strong-Tie is a 1-1/4" fastener engineered for securing wood siding panels in demanding outdoor environments. Featuring an annular ring shank for superior withdrawal resistance and a checkered full round head that blends naturally with wood grain, this nail delivers the holding power and pull-through resistance that exterior siding applications require. Manufactured from Type 316 stainless steel - the grade preferred for coastal, seaside, and high-moisture environments - these nails resist corrosion where standard fasteners would fail, helping exterior siding remain secure and structurally sound over the long term.

Key Features

• Annular ring shank - increases withdrawal resistance so siding boards stay firmly anchored, reducing the cupping and loosening that can occur with smooth-shank fasteners over time
• Type 316 stainless steel material - provides superior corrosion resistance in saltwater, seaside, and chemically aggressive environments where other finishes degrade prematurely
• Checkered full round head pattern - blends with wood grain, reduces glare from sunlight, and accepts surface finishes for a cleaner, more natural appearance on finished siding
• Diamond point - designed for easier driving through wood siding panels, reducing installation effort and minimizing splitting risk
• 14-gauge, 0.083" shank diameter - provides a balance of structural holding strength and compatibility with wood siding panel thickness
• 1-1/4" length (3d penny size) - sized specifically for wood siding fastening applications where a shorter, precise fastener is required
• Made in the United States - built to Simpson Strong-Tie quality standards for reliable, consistent performance on every project

Why This Product

• Built for coastal and high-moisture environments: Type 316 stainless steel offers a higher level of corrosion resistance than standard stainless grades, making these nails the right choice for seaside homes, high-humidity climates, and any exterior siding project where long-term durability against the elements is a priority.
• Engineered to resist siding movement and pull-through: The annular ring shank design mechanically grips wood fibers more aggressively than smooth-shank alternatives, delivering the pull-through resistance and withdrawal strength needed to keep siding panels stable through seasonal wood expansion and contraction.
• Designed to disappear into the wood surface: The checker-patterned head reduces visual glare and accepts paints and surface finishes, so the fastener integrates cleanly into the finished appearance of the siding rather than standing out as a metallic dot on the surface.
• Trusted Simpson Strong-Tie construction fastener: Simpson Strong-Tie is an established name in structural fastening, and these wood siding nails are part of a broader system of exterior fastening solutions designed to meet the demands of professional construction and long-term outdoor performance.

Specifications

• Brand: Simpson Strong-Tie
• Penny Size: 3d
• Length: 1-1/4 in.
• Gauge: 14
• Shank Diameter: 0.083 in.
• Head Diameter: 5/32 in.
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Pattern: Checkered
• Point Type: Diamond Point
• Finish: Type 316 Stainless Steel
• Material: Type 316 Stainless Steel
• Approx. Count per Lb.: 495
• Country of Origin: United States

Available Pack Options

• T3SND1: 1 Lb (495)
• T3SND5: 5 Lb (2475)
• T3SNDB: 25 Lb (12375)

Approved Applications

• Fastening Wood Siding

Frequently Asked Questions

Why should I use Type 316 stainless steel nails for wood siding instead of a standard finish?

Type 316 stainless steel provides superior corrosion resistance compared to standard stainless grades, making it the preferred choice for seaside applications, high-humidity climates, and any exterior siding installation where long-term exposure to moisture or salt air is a concern. This finish helps prevent rust staining on the siding surface and extends the service life of the fastener connection.

What is an annular ring shank, and why does it matter for wood siding?

An annular ring shank features a series of rings along the nail's shank that grip wood fibers mechanically as the nail is driven. For wood siding applications, this design significantly increases withdrawal resistance and pull-through resistance compared to smooth-shank nails, helping to keep siding panels firmly secured even as the wood expands and contracts with seasonal temperature and moisture changes.

What does the checkered head pattern on these nails do?

The checker pattern on the full round head serves several practical purposes: it blends with wood grain for a less visually prominent appearance, reduces glare from sunlight on the nail head, and allows the head surface to accept paints and other surface finishes - helping the fastener integrate seamlessly into the finished look of the wood siding installation.

How many of these nails are in a pound?

There are approximately 495 nails per pound. This count is based on the 14-gauge, 1-1/4" annular ring shank design in Type 316 stainless steel. Actual count may vary slightly. Available pack sizes are listed in the pack options section above.