Simpson 7d 2-1/4" Wood Siding Nail in Type 304 Stainless Steel by Simpson Strong-Tie is engineered for secure, long-lasting attachment of wood siding panels in exterior applications. Featuring an annular-ring shank for superior withdrawal resistance and a checkered full round head that blends naturally with wood grain, this 13-gauge nail delivers reliable holding power and pull-through resistance where it counts most. The diamond point drives cleanly into wood siding, making installation faster and more consistent. Built from Type 304 stainless steel, these nails resist corrosion in outdoor environments, helping exterior wood siding stay firmly fastened for years.

Key Features

• Annular-ring shank - increases withdrawal resistance so siding boards hold firmly and resist cupping over time
• Type 304 stainless steel material and finish - provides corrosion resistance in outdoor and moisture-exposed applications, extending the life of the fastener and the siding it secures
• Checkered full round head pattern - blends with wood grain, reduces surface glare from sunlight, and accepts paint or stain finishes for a cleaner appearance
• Diamond point tip - allows easier, more precise driving into wood siding panels, reducing splitting and installation effort
• 13-gauge, 2-1/4" length (7d penny size) - sized specifically for wood siding fastening applications, balancing penetration depth with holding strength
• 5/32" head diameter - provides adequate pull-through resistance to keep siding panels securely seated against the substrate
• 0.092" shank diameter - sized to minimize splitting in wood siding while maintaining the structural grip needed for exterior panel attachment
• Made in the United States - manufactured to Simpson Strong-Tie quality standards for consistent performance across fastening applications

Why This Product

• The annular-ring shank design directly addresses one of the most common siding failures - nail withdrawal over time - by mechanically locking the fastener into the wood for a more permanent hold than smooth-shank alternatives
• Type 304 stainless steel construction makes these nails well suited to outdoor and weather-exposed installations where standard steel fasteners would corrode and stain surrounding wood surfaces
• The checker-patterned head was specifically designed for wood siding work - it reduces visible glare and accepts surface finishes, so nail heads are far less noticeable on finished exterior walls
• At 13 gauge with a diamond point, this nail balances driving ease with the structural holding power needed for wood siding panels, reducing the risk of splitting while still delivering excellent pull-through resistance

Specifications

• Brand: Simpson Strong-Tie
• Material: Type 304 Stainless Steel
• Finish: Type 304 Stainless Steel
• Penny Size: 7d
• Length: 2-1/4 in.
• Gauge: 13
• Head Type: Full Round Head
• Head Pattern: Checkered
• Head Diameter: 5/32 in.
• Shank Type: Annular-Ring Shank
• Shank Diameter: 0.092 in.
• Point Type: Diamond Point
• Approximate Count Per Lb: 215
• Country of Origin: United States

Available Pack Options

• S7SND1: 1 Lb (215)
• S7SND5: 5 Lb (1075)
• S7SNDB: 25 Lb (5375)

Approved Applications

• Fastening Wood Siding

Frequently Asked Questions

What type of shank does this nail have, and why does it matter for wood siding?

This nail features an annular-ring shank, which is designed to increase withdrawal resistance compared to smooth-shank nails. In wood siding applications, this means the fastener locks more securely into the material, reducing the likelihood of siding boards loosening, bowing, or cupping over time.

Is Type 304 stainless steel appropriate for all exterior siding applications?

Type 304 stainless steel offers good corrosion resistance for most outdoor and moisture-exposed applications. For seaside or coastal environments where salt air and more aggressive corrosion conditions are present, a Type 316 stainless steel fastener is generally the recommended choice for superior corrosion protection.

What does the checkered head pattern do on these wood siding nails?

The checkered pattern on the full round head serves several practical purposes for wood siding work - it blends with the natural wood grain texture, reduces visible glare from sunlight on the nail head surface, and allows the head to accept paint, stain, or other surface finishes so the fasteners are less noticeable on finished exterior walls.

How many of these nails are in a pound?

There are approximately 215 of these 7d 2-1/4" Type 304 stainless steel wood siding nails per pound, which can help with estimating quantities needed for a given project. Available pack options are listed in the pack selection section above.

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