Simpson 4d 1-1/2" Wood Siding Nail in Type 316 Stainless Steel is a professional-grade fastener from Simpson Strong-Tie, engineered for securing wood siding panels in demanding outdoor and coastal environments. The annular-ring shank design delivers superior withdrawal resistance, while the checker-patterned full round head blends naturally with wood grain - making this nail a go-to choice for exterior siding installations where both holding strength and finished appearance matter. Built from Type 316 stainless steel, these nails resist corrosion in saltwater-exposed, seaside, and harsh weather conditions where standard fasteners fail prematurely.

Key Features

• Type 316 Stainless Steel material - provides superior corrosion resistance in coastal, seaside, and chemically aggressive outdoor environments, extending the service life of wood siding installations well beyond what standard steel fasteners can achieve
• Annular-ring shank - dramatically increases withdrawal resistance compared to smooth-shank nails, keeping siding boards held tight and reducing cupping, warping, or pull-through over time
• Checkered full round head pattern - blends with wood grain, reduces glare from sunlight, and accepts surface finishes so the fastener stays low-profile and visually consistent with the siding surface
• Diamond point - designed for easier driving into wood siding panels, reducing splitting risk and improving installation speed and precision
• 14-gauge wire diameter at 0.083" shank - delivers a balanced combination of strength and slender profile appropriate for wood siding panel fastening applications
• 1-1/2" length (4d penny size) - sized specifically for exterior wood siding panels, providing adequate penetration without overdriving or splitting thin siding boards

Why This Product

• Built for coastal and harsh outdoor conditions - Type 316 stainless steel is the recognized standard for seaside applications, where salt air and moisture would rapidly corrode lesser fasteners and compromise the integrity of wood siding attachments
• Engineered to keep siding flat and secure - the annular-ring shank resists withdrawal forces that cause siding boards to cup, loosen, or pull away from the wall over years of seasonal movement and moisture exposure
• Designed to disappear into the finished surface - the checker-patterned head reduces glare and accepts paint or stain, so the fastener integrates cleanly with the siding rather than standing out as a visible flaw
• Made in the United States by a trusted structural fastener brand - Simpson Strong-Tie's wood siding nails are purpose-built for exterior fastening projects where long-term corrosion resistance and holding power are non-negotiable requirements

Specifications

• Brand: Simpson Strong-Tie
• Penny Size: 4d
• Length: 1-1/2 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/Material: Type 316 Stainless Steel
• Approx. Count Per Lb: 398
• Country of Origin: United States

Available Pack Options

• T4SND1: 1 Lb (398)
• T4SND5: 5 Lb (1990)
• T4SNDB: 25 Lb (9950)

Approved Applications

• Fastening Wood Siding

Frequently Asked Questions

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

Type 316 stainless steel offers superior corrosion resistance compared to standard coatings, making it specifically well-suited for seaside and coastal applications where salt air, moisture, and harsh outdoor conditions are present. It is the appropriate material choice when long-term corrosion resistance is a priority for exterior wood siding installations.

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

An annular-ring shank features raised rings along the shank that grip the wood fibers as the nail is driven, significantly increasing withdrawal resistance compared to a smooth-shank nail. For wood siding panels, this means the fastener holds more securely against the forces that cause boards to cup, pull away, or loosen over time due to moisture and seasonal movement.

What does the checkered head pattern on these nails do?

The checker pattern on the full round head serves multiple practical purposes: it blends with the natural texture of wood grain so the nail head is less visually prominent, it reduces glare from sunlight that a smooth polished head would create, and it allows the head surface to accept paint or other surface finishes applied over the siding.

What is the approximate nail count per pound for these 1-1/2" wood siding nails?

These 4d 1-1/2" Type 316 stainless steel wood siding nails have an approximate count of 398 nails per pound, which can be a helpful reference when estimating how many you need for a given siding project.

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