Simpson 3-1/2" 16d Finishing Nail in 316 Stainless Steel is engineered for demanding fastening applications where long-term corrosion resistance is non-negotiable. Crafted by Simpson from 11-gauge Type 316 stainless steel, this finishing nail delivers reliable holding power in coastal, marine, and chemically aggressive environments where standard fasteners would fail prematurely. The brad head design keeps the nail nearly invisible at the surface, and the smooth diamond-point shank drives cleanly into wood without splitting - making these nails the preferred choice for finish carpentry, trim work, and exterior millwork that must stay secure and look great for years.

Key Features

• Type 316 stainless steel construction - provides superior resistance to saltwater, chlorides, and corrosive chemicals, making these nails ideal for seaside and marine applications where lesser metals would rust and stain surrounding materials
• 11-gauge shank diameter - delivers substantial holding strength in dense and hardwood trim without the risk of splitting that thicker fasteners can cause
• Brad head design (0.165" head diameter) - the head is only slightly larger than the shank, allowing the nail to be countersunk below the work surface and concealed with filler for a clean, professional finish
• Smooth shank - drives easily and consistently with minimal resistance, reducing driver fatigue on larger trim and finish projects
• Diamond point tip - self-starting point pierces wood fibers cleanly for faster, straighter driving and reduced material damage
• 3-1/2" length (16d penny size) - provides deep, secure penetration through finish material and into structural substrate for a lasting, stable connection
• Made in the United States - manufactured to consistent quality standards, giving builders and contractors confidence in dimensional accuracy and material integrity

Why This Product

• The right choice for coastal and seaside projects: Type 316 stainless steel contains molybdenum, which gives it a measurably higher resistance to salt spray and chloride corrosion compared to standard 304 stainless - protecting both the fastener and the surrounding finish material from rust staining over time
• Purpose-built for finish carpentry: the brad head profile sits flush or countersinks below the surface without a wide visible imprint, so trim, casing, and millwork retain a polished, clean appearance after installation
• Fastener longevity matched to premium materials: when installing hardwood, cedar, redwood, or composite trim that is designed to last decades, a 316 stainless nail ensures the fastener does not become the weakest link in the assembly
• Drives without damage: the smooth shank and diamond point combination minimizes wood splitting and reduces the need for pre-drilling, saving time on detailed finish work where material damage is costly

Specifications

• Brand: Simpson Strong-Tie
• Material / Coating: Type 316 Stainless Steel
• Gauge: 11
• Penny Size: 16d
• Length: 3-1/2 in.
• Head Diameter: 0.165 in.
• Shank Diameter: 0.12 in.
• Shank Type: Smooth
• Head Type: Brad Head
• Head Pattern: Smooth
• Point Type: Diamond Point
• Approx. Count per Lb.: 86
• Country of Origin: United States

Available Pack Options

• T16FN1: 1 Lb (86)
• T16FN5: 5 Lb (430)
• T16FNB: 25 Lb (2150)

Frequently Asked Questions

What makes Type 316 stainless steel different from other stainless steel grades for nails?

Type 316 stainless steel includes molybdenum in its alloy composition, which significantly increases its resistance to chloride corrosion and salt spray compared to standard 304 stainless steel. This makes 316 stainless the recommended choice for applications near the ocean, in marine environments, or anywhere the fastener will be exposed to salt air, moisture, or harsh chemicals over an extended period.

Can these finishing nails be countersunk and concealed?

Yes. The brad head on these nails is only slightly larger than the 0.12 in. shank diameter, with a head diameter of 0.165 in. This compact profile allows the nail to be driven below the work surface using a nail set and then filled with wood putty or caulk, resulting in a virtually invisible fastener point - ideal for trim, casing, and finish carpentry applications.

What types of projects are 3-1/2" 16d finishing nails best suited for?

At 3-1/2 inches in length, 16d finishing nails are well-suited for fastening thick trim boards, baseboards, door casing, exterior millwork, and structural finish elements where deeper penetration into the substrate is needed for a secure hold. The 316 stainless steel construction makes them especially appropriate for exterior and coastal finishing applications where corrosion resistance is a priority.

Do these nails require pre-drilling before driving?

In most cases, no. The diamond point tip is designed to pierce wood fibers cleanly and the smooth shank reduces resistance during driving, minimizing the risk of splitting. However, when working with very dense hardwoods or close to the edge of a board, pilot holes are always a good practice to prevent cracking or splitting of the finish material.

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