Simpson 16d 3-1/2" Premium Siding Nail in passivated Type 316 stainless steel is engineered for siding installations in severely corrosive environments where standard fasteners fail - including coastal, seaside, and high-moisture applications. Manufactured by Simpson, this 11-gauge annular ring shank nail delivers exceptional holding power while resisting the salt air, humidity, and chemical exposure that degrade ordinary nails over time.

Key Features

• Type 316 stainless steel construction - offers superior resistance to saltwater, chemicals, and harsh outdoor environments, making it the right fastener for coastal siding and severe-exposure installations
• Passivated finish - the passivation process enhances the nail's natural corrosion resistance, ensuring long-term performance even in the most demanding seaside conditions
• Annular ring shank design - increases withdrawal resistance and provides greater holding power compared to smooth-shank nails, reducing the risk of siding loosening over time
• Circle head pattern with reduced glare - the patterned full round head minimizes surface reflection and accepts surface finishes, resulting in a cleaner, more professional appearance on finished siding
• Blunt diamond point - drives true and reduces board splitting, protecting the integrity of siding boards during installation
• 16d penny size, 3-1/2" length - sized for standard siding fastening tasks, providing adequate penetration depth for secure attachment
• 11-gauge wire diameter (0.12" shank) - balances nail strength with reduced splitting risk across a range of siding materials
• 1/4" head diameter, full round head - broad bearing surface distributes holding force evenly across the siding face for a secure, lasting connection

Why This Product

• Built for coastal and high-corrosion environments - Type 316 stainless steel with passivation is specifically suited for seaside siding applications where salt air and moisture would rapidly corrode lower-grade fasteners, reducing callbacks and premature failures
• Annular ring shank means nails stay put - the ring shank geometry mechanically locks into wood fibers, providing greater withdrawal resistance than smooth-shank alternatives and keeping siding secure through seasonal movement and weather cycles
• Finish-friendly head design - the circle pattern head is engineered to reduce glare and accept surface coatings, so nails blend into painted or stained siding rather than standing out visually
• Splits less, installs cleaner - the blunt diamond point is designed to drive true and minimize board splitting, which is especially important when fastening siding where aesthetics and board integrity both matter

Specifications

• Brand: Simpson Strong-Tie
• Coating/Material: Type 316 Stainless Steel
• Gauge: 11
• Penny Size: 16d
• Length: 3-1/2 in.
• Head Diameter: 1/4 in.
• Shank Diameter: 0.12 in.
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Pattern: Circle Head
• Point Type: Diamond Point
• Approx. Count per Lb.: 88
• Country of Origin: United States

Available Pack Options

• T16KR41: 1 Lb (88)
• T16KR45: 5 Lb (440)
• T16KR4B: 25 Lb (2200)

Frequently Asked Questions

Why is Type 316 stainless steel recommended for seaside siding applications?

Type 316 stainless steel contains molybdenum, which gives it enhanced resistance to chloride corrosion - the type caused by saltwater and sea air. Combined with the passivation process applied to these nails, this material is specifically suited for severely corrosive coastal and high-moisture siding environments where lower-grade fasteners would rust and fail prematurely.

What does "passivated" mean and why does it matter?

Passivation is a chemical treatment process that removes surface contaminants from stainless steel and promotes the formation of a stable, protective oxide layer. This layer acts as a barrier against corrosion, ensuring the nail maintains its resistance to rust and degradation even after being driven into siding in harsh outdoor or coastal conditions.

How does the annular ring shank improve performance compared to a smooth shank?

The annular ring shank features ridges along the shank that mechanically interlock with wood fibers as the nail is driven. This increases withdrawal resistance - meaning the nail requires significantly more force to pull out than a smooth-shank nail of the same size - resulting in greater holding power and siding that stays securely fastened through temperature changes, wind loads, and seasonal movement.

Is this nail manufactured in the United States?

Yes. This Simpson Premium Siding Nail is a product of the United States, as indicated in the product specifications.

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