Simpson 3-1/2" 16d Finishing Nail in 304 Stainless Steel is a premium fastener engineered for projects where long-term durability and a clean, low-profile finish matter most. Crafted from Type 304 stainless steel at 11 gauge, this brad-head nail delivers reliable corrosion resistance in demanding environments while allowing the nail head to be countersunk and concealed beneath the work surface for a polished, professional result. Whether you are trimming out interior millwork or tackling exterior finish carpentry in moisture-prone areas, this stainless steel finishing nail is built to last as long as the materials it secures.

Key Features

• Type 304 Stainless Steel material - resists rust and corrosion in humid, wet, and chemically active environments, making it a dependable long-term fastener for finish applications where ordinary steel nails would fail
• 11 gauge, 3-1/2" length (16d penny size) - provides substantial holding power for thick trim, molding, and finish lumber without splitting the workpiece
• Brad head design - the head is only slightly larger than the shank, minimizing visibility and allowing easy concealment through countersinking for a clean finished appearance
• Smooth shank - drives cleanly and consistently with less resistance, reducing the effort needed to seat each nail flush or below the surface
• Diamond point tip - sharp point geometry starts the nail precisely and reduces the chance of the nail deflecting or splitting fine finish lumber during installation
• Smooth head pattern - leaves a minimal surface impression, ideal for finish work where appearance after putty or paint is critical
• Made in the United States - domestic manufacturing supports consistent quality standards for professional and contractor-grade fastener applications

Why This Product

• Stainless steel construction means the fastener will not rust, stain, or corrode over time - protecting both the fastener and the surrounding finish material in high-moisture or outdoor-adjacent environments
• The brad head and smooth shank combination makes these nails ideal when appearance is a priority - countersink below the surface, fill, sand, and paint for a result where no fastener is visible
• At 3-1/2" and 16d penny size, this nail is sized for heavier finish work such as thick baseboard, door casing, crown molding, and structural trim applications that demand more holding power than a standard 2" or 2-1/2" finish nail
• Simpson's 304 stainless steel is a proven upgrade over galvanized or electroplated finishes in corrosive conditions - for seaside and saltwater-adjacent applications, consider Type 316 stainless steel for even greater corrosion resistance

Specifications

• Brand: Simpson Strong-Tie
• Coating/Material: Type 304 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 Shank
• Head Type: Brad Head
• Head Pattern: Smooth
• Point Type: Diamond Point
• Approx. Count per Lb.: 86
• Country of Origin: United States

Available Pack Options

• S16FN1: 1 Lb (86)
• S16FN5: 5 Lb (430)
• S16FNB: 25 Lb (2150)

Frequently Asked Questions

What is the difference between a brad head nail and a standard finishing nail?

A brad head nail has a head that is only slightly larger than the shank diameter - in this case, a 0.165 in. head on a 0.12 in. shank. This small head allows the nail to be countersunk easily below the work surface and concealed with filler, whereas a standard finishing nail or common nail has a larger head that is more difficult to hide. The result is a cleaner, less visible fastener in trim and finish applications.

Is Type 304 stainless steel suitable for outdoor or high-moisture finish applications?

Yes. Type 304 stainless steel offers strong resistance to rust and corrosion, making it well-suited for finish work in humid, wet, or outdoor-adjacent environments where standard steel nails would corrode and stain the surrounding material. For direct seaside or saltwater-exposed applications, Type 316 stainless steel provides even greater corrosion resistance and is worth considering instead.

How many of these nails are there per pound?

There are approximately 86 nails per pound for this 3-1/2" 16d stainless steel finishing nail. This count can be useful when estimating how much material you need for a larger finish carpentry or trim project.

What types of finish work are these nails best suited for?

With a 3-1/2" length and 16d penny size, these nails are designed for heavier finish applications such as thick baseboard, wide door casing, crown molding, chair rail, and structural interior or exterior trim. The brad head and diamond point make them easy to drive cleanly into finish lumber, and the smooth shank allows consistent seating with a hammer or nail set.