Simpson 7d 2-1/4" Shake and Shingle Siding/Roofing Nail in Type 316 Stainless Steel by Simpson Strong-Tie is a premium fastener engineered for securing wood shakes and shingles in both roofing and exterior siding applications. Featuring an annular-ring shank for exceptional withdrawal resistance, a full round checkered head, and Type 316 stainless steel construction, this nail delivers long-lasting, corrosion-resistant performance even in demanding coastal and outdoor environments. The combination of a slender shank and diamond point makes driving easier while protecting wood materials from splitting during installation.

Key Features

• Type 316 Stainless Steel material - resists corrosion, saltwater exposure, and harsh outdoor conditions, making it well-suited for coastal installations and long-term exterior applications
• Annular-ring shank - increases withdrawal resistance so fasteners grip tightly and stay secure over time, even as wood expands and contracts with seasonal changes
• 7/32" full round head diameter - provides ample bearing surface to hold shakes and shingles firmly in place without pulling through
• Checkered head pattern - blends with natural wood grain, reduces glare from sunlight, and accepts surface finishes for a clean, low-profile appearance
• Slender 0.092" shank diameter - minimizes wood splitting during installation, protecting the integrity of thin shake and shingle materials
• Diamond point - pierces wood cleanly and starts easily, reducing driving effort and improving installation efficiency
• 7d penny size, 2-1/4" length - sized appropriately for standard shake and shingle fastening applications in roofing and wood siding work
• 13-gauge construction - delivers a balance of strength and slenderness suited to the demands of exterior fastening in shake and shingle materials
• Made in the United States - manufactured domestically to meet consistent quality standards for professional and contractor use

Why This Product

• For roofing and wood siding projects where long-term corrosion resistance is critical, the Type 316 stainless steel construction holds up against moisture, salt air, and outdoor weathering without degrading the fastener or staining surrounding materials
• The annular-ring shank design directly addresses one of the most common problems in exterior fastening - nail withdrawal over time - by locking the nail firmly into wood fibers for a more secure, durable hold than smooth-shank alternatives
• The slender shank combined with the diamond point makes this nail a practical choice when working with split-prone shake and shingle materials, reducing the risk of cracking and material waste during installation
• The checkered full round head provides both functional holding power and an aesthetically compatible finish, blending into wood surfaces rather than standing out visually - a meaningful detail for exposed roofing and siding installations

Specifications

• Brand: Simpson Strong-Tie
• Penny Size: 7d
• Length: 2-1/4 in.
• Gauge: 13
• Material/Finish: Type 316 Stainless Steel
• Shank Type: Annular-Ring Shank
• Shank Diameter: 0.092 in.
• Head Type: Full Round Head
• Head Diameter: 7/32 in.
• Head Pattern: Checkered
• Point Type: Diamond Point
• Approx. Count Per Lb: 216
• Country of Origin: United States

Available Pack Options

• T7SN75: 5 Lb (1080)
• T7SN7B: 25 Lb (5400)

Approved Applications

• Roofing
• Fastening Wood Siding

Frequently Asked Questions

Why is Type 316 stainless steel recommended for shake and shingle fastening?

Type 316 stainless steel offers superior corrosion resistance compared to standard steel, making it an appropriate choice for exterior roofing and siding applications where the fasteners are exposed to moisture, rain, and potentially salt-laden air. It helps prevent rust staining on visible wood surfaces and extends the service life of the installation.

What is the benefit of an annular-ring shank on a roofing nail?

The annular-ring shank features ridges along the shank that grip the surrounding wood fibers, significantly increasing withdrawal resistance. This means the nail is much harder to pull out than a smooth-shank nail, which is especially important in roofing and siding where wind uplift and material movement can otherwise work nails loose over time.

Will this nail split shake or shingle materials during installation?

The slender 0.092" shank diameter is specifically designed to minimize splitting when driving into thin or delicate shake and shingle materials. The diamond point also helps by piercing the wood cleanly rather than pushing fibers apart, reducing the risk of cracking during installation.

How does the checkered head pattern affect installation and appearance?

The checkered pattern on the full round head serves multiple practical purposes - it blends with the natural texture of wood grain, reduces glare from direct sunlight, and accepts surface finishes that may be applied over the fastener area. This makes it a better-looking option for installations where nail heads remain visible.

Note: Product dimensions may differ from picture. Please refer to the specifications listed above for accurate measurements.