Simpson 12d Finishing Nail, 3-1/4 in. 11-Gauge 304 Stainless Steel is built for finish carpentry and trim work where corrosion resistance and a clean, concealed fastener profile are non-negotiable. The brad head design allows countersinking below the work surface, leaving a near-invisible fastener point that requires minimal filling - making these nails a natural fit for trim, molding, millwork, wood siding, fascia, and soffit installation in high-moisture or corrosive environments. American-made and packed in a 25-lb box, these stainless steel finishing nails are a practical choice for contractors and builders who need fasteners that perform as long as the materials they secure.

Key Features

• Type 304 Stainless Steel construction - resists corrosion in demanding interior and exterior environments, ensuring fasteners will not rust, stain, or bleed through painted or stained surfaces over time.
• Brad head with smooth head pattern - sits only slightly larger than the shank diameter, allowing the nail to be countersunk cleanly below the work surface for a near-invisible finish that minimizes touch-up work.
• Diamond point tip - drives cleanly into wood with reduced splitting, making it well suited for finish carpentry applications where material quality matters.
• Smooth shank profile - allows controlled, consistent driving in finish work where over-penetration must be avoided and precise depth matters.
• 11-gauge wire diameter - balances holding strength with a low-profile head, giving professionals the structural integrity needed for trim and siding applications without sacrificing a clean finished appearance.
• American-made - produced domestically to consistent quality standards, supporting projects that specify domestic-origin fasteners.

Why This Product

• Purpose-built for corrosive and high-moisture environments - Type 304 Stainless Steel construction makes these finishing nails a reliable long-term choice for coastal, exterior, and humid interior applications where standard steel fasteners would degrade and cause surface staining.
• Delivers a clean, professional finish - the brad head design countersinks easily below the work surface, reducing the filler and touch-up time typically required with larger-head fasteners on visible trim and millwork.
• Versatile across common finish carpentry applications - approved for interior and exterior trim, molding, wood siding, fascia, and soffit work, making this a single stainless steel nail solution that covers a wide range of job-site needs.
• Trusted Simpson quality in a job-site-ready format - supplied by Simpson, a recognized name in structural and finish fasteners, these nails arrive ready to use for professionals who rely on consistent, specification-grade performance.

Specifications

• Model Number: S12FNB
• Material / Coating: Type 304 Stainless Steel
• Gauge: 11
• Penny Size: 12d
• Length: 3-1/4 in.
• Head Diameter: 0.165 in.
• Shank Diameter: 0.12 in.
• Shank Type: Smooth Shank
• Head Type: Brad Head
• Head Pattern: Smooth Head
• Point Type: Diamond Point
• Approximate Count: 2,425 nails per 25-lb box
• Package Weight: 25 lb
• Country of Origin: United States

Approved Applications

• Interior and exterior finish carpentry requiring concealed fasteners
• Trim, molding, and millwork installation in corrosive or high-moisture environments
• Wood siding, fascia, and soffit installation where stainless steel fasteners are specified
• Projects demanding fasteners that will not stain or bleed through painted or stained surfaces
• Any application where longevity in corrosive environments is a primary concern

What's Included

• 25 lb box of Simpson Type 304 Stainless Steel 12d Finishing Nails (approx. 2,425 nails), Model S12FNB

Frequently Asked Questions

What type of stainless steel are these finishing nails made from, and why does it matter?

These nails are made from Type 304 stainless steel, which provides superior corrosion resistance. This makes them well suited for applications in demanding environments where standard steel fasteners would rust or degrade over time, ensuring the fasteners last as long as the materials they secure.

What gauge are these nails, and how many come in a 25-lb box?

These finishing nails are 11-gauge and measure 3-1/4" in length, corresponding to a 12d size. A 25-lb box contains approximately 2,425 nails, making it a practical quantity for larger projects and professional use.

Can these nails be countersunk for a clean finish?

Yes. These nails feature a brad head design, meaning the head is only slightly larger than the shank diameter. This allows the nail to be easily countersunk below the work surface, leaving a near-invisible fastener point that requires minimal filling or finishing work for a clean, professional result.

What shank and point style do these finishing nails have?

These nails feature a smooth shank with a diamond point. The smooth shank and diamond point work together to facilitate easier driving and consistent penetration into the work surface, which is especially important in finish-grade applications where precision matters.