Simpson 16d x 3-1/2" Gray Painted Siding Nail in Type 304 Stainless Steel is a premium fastener engineered specifically for cedar, redwood, and cypress siding applications. Crafted from Type 304 stainless steel with a gray painted finish, these full round head nails are designed to deliver both holding strength and a discreet, blended appearance on wood siding surfaces. The annular-ring shank provides superior withdrawal resistance, making these siding nails a reliable choice for exterior wood cladding projects where performance and aesthetics both matter.

Key Features

• Type 304 Stainless Steel material - provides excellent corrosion resistance for outdoor siding installations, helping fasteners hold up against moisture and weather exposure over time
• Gray painted finish - helps nail heads blend visually with siding material, resulting in a cleaner, less visible fastener appearance on finished wood siding
• Checkered head pattern - the checker texture on the full round head blends with natural wood grain, making installed nails far less noticeable on cedar, redwood, or cypress surfaces
• Annular-ring shank - the ringed shank significantly increases withdrawal resistance compared to smooth-shank nails, locking the fastener securely into the siding and substrate
• 11-gauge, 0.120" shank diameter - a slender profile makes driving easier and reduces the risk of splitting delicate siding materials like cedar and redwood
• Diamond point tip - the sharp diamond point allows for easier nail driving and cleaner entry into wood siding, reducing surface damage during installation
• 16d penny size, 3-1/2" length - appropriate sizing for fastening wood siding to structural framing, providing sufficient depth of penetration for a secure hold
• Made in the United States - domestic manufacturing supports consistent quality standards for a professional-grade siding fastener

Why This Product

• Built for wood siding aesthetics as well as strength - the combination of a gray painted finish and a checkered head pattern means these nails are specifically designed to disappear into cedar, redwood, and cypress siding, not just hold it in place. Other standard nails leave exposed metal heads that stand out on finished surfaces.
• Annular-ring shank for long-term holding power - where smooth-shank nails can back out over time due to wood movement and seasonal expansion, the annular-ring shank on these nails grips the wood fibers aggressively, maintaining a secure attachment through the life of the siding installation.
• Stainless steel construction suited for moisture-exposed exterior work - Type 304 stainless steel resists corrosion in exterior environments, making these nails appropriate for siding applications where moisture contact is a regular concern.
• Slender 11-gauge profile reduces splitting risk - cedar, redwood, and cypress are known for their natural tendency to split. The thinner 0.120" shank diameter paired with a diamond point helps drive these nails cleanly without cracking the siding boards, preserving material integrity.

Specifications

• Brand: Simpson Strong-Tie
• Material: Type 304 Stainless Steel
• Finish: Type 304 Stainless Steel
• Color: Gray
• Penny Size: 16d
• Length (in.): 3-1/2
• Gauge: 11
• Shank Diameter (in.): 0.120
• Head Diameter (in.): 1/4
• Head Type: Full Round Head
• Head Pattern: Checkered
• Shank Type: Annular-Ring Shank
• Point Type: Diamond Point
• Approx. Count per Lb.: 88
• Country of Origin: United States

Available Pack Options

• S16SNDG1: 1 Lb (88)
• S16SNDG5: 5 Lb (440)
• S16SNDGB: 25 Lb (2200)

Approved Applications

• Fastening Wood Siding

Frequently Asked Questions

What types of siding material are these nails designed for?

These painted siding nails are specifically designed for cedar, redwood, and cypress siding materials. The slender 11-gauge shank and diamond point help prevent splitting in these wood species, while the annular-ring shank provides strong holding power in exterior siding applications.

Why does the nail head have a checkered pattern and gray painted finish?

The checkered pattern on the full round head is designed to blend with the natural texture of wood siding, while the gray painted finish helps the nail head visually match the siding surface. Together, these features make installed nails much less noticeable on finished cedar, redwood, or cypress siding.

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

The annular-ring shank increases withdrawal resistance by gripping wood fibers along the entire length of the shank. This means the nail resists backing out over time - even as wood siding expands and contracts with seasonal moisture and temperature changes - providing a more secure and lasting attachment than a standard smooth-shank nail.

Is Type 304 stainless steel appropriate for all siding environments?

Type 304 stainless steel provides solid corrosion resistance for most exterior wood siding applications. For installations in seaside or coastal environments where salt air and higher corrosion conditions are present, Type 316 stainless steel is the recommended upgrade for superior corrosion resistance.

Note: Product dimensions may differ from picture.