Simpson 2-1/2" 8d Finishing Nail in 316 Stainless Steel is a premium brad-head fastener built for applications where long-term corrosion resistance is essential. Crafted by Simpson from 12-gauge 316 stainless steel, this smooth-shank finishing nail delivers a clean, nearly invisible installation - ideal for trim, millwork, and exterior woodworking in demanding or coastal environments where ordinary fasteners fail prematurely.

Key Features

• 316 Stainless Steel construction - provides superior resistance to saltwater, moisture, and harsh chemical environments, making these nails a reliable choice for seaside and high-humidity applications where standard steel or even 304 stainless can corrode
• 12-gauge wire diameter with 0.113" shank - delivers sturdy holding strength while maintaining the slim profile expected of a finishing nail, reducing the risk of splitting in trim and finish lumber
• Brad head style (0.148" head diameter) - the head is only slightly larger than the shank, so it sits nearly flush and can be countersunk below the work surface for a clean, concealed finish
• Smooth shank - drives cleanly with minimal resistance, reducing surface damage and making seating straightforward in finish carpentry work
• Diamond point tip - self-starting geometry guides the nail accurately into the workpiece, helping avoid splitting and improving placement precision
• 2-1/2" length (8d penny size) - suited for attaching trim, casing, and finish boards where a longer nail is needed to achieve solid withdrawal resistance without overdriving
• Made in the United States - domestic manufacturing supports consistent quality and material traceability for projects with sourcing requirements

Why This Product

• Engineered for corrosive environments - Type 316 stainless steel is the preferred grade for coastal, marine, and chemical-exposure settings because of its enhanced resistance to chloride-induced corrosion. These nails are built to last as long as the materials they fasten, preventing unsightly staining and structural degradation from rusting fasteners.
• Virtually invisible after installation - the brad head and smooth shank allow the nail to be countersunk below the surface and filled over, so the fastener disappears entirely in finished trim work - a practical advantage on any project where appearance matters.
• Right size for finish carpentry - the 2-1/2" (8d) length offers enough penetration depth for solid holding in door casings, baseboards, crown molding, and exterior trim without the bulk of a framing nail.
• A premium, long-term upgrade - choosing 316 stainless over galvanized or standard steel fasteners means the fastener will not underperform or fail before the surrounding materials do, reducing costly callbacks and rework in corrosive or wet outdoor conditions.

Specifications

• Brand: Simpson Strong-Tie
• Nail Type: Finishing Nail
• Material/Coating: Type 316 Stainless Steel
• Gauge: 12
• Penny Size: 8d
• Length: 2-1/2 in.
• Head Type: Brad Head
• Head Pattern: Smooth
• Head Diameter: 0.148 in.
• Shank Type: Smooth Shank
• Shank Diameter: 0.113 in.
• Point Type: Diamond Point
• Approx. Count per Lb.: 146
• Country of Origin: United States

Available Pack Options

• T8FN1: 1 Lb (146)
• T8FN5: 5 Lb (730)
• T8FNB: 25 Lb (3650)

Frequently Asked Questions

What makes Type 316 stainless steel better than other stainless grades for outdoor or coastal use?

Type 316 stainless steel contains molybdenum, which gives it enhanced resistance to chloride corrosion - the kind that occurs in saltwater environments and from exposure to many de-icing chemicals. This makes 316-grade fasteners the preferred choice for seaside construction, docks, decking trim, and any application where long-term exposure to moisture or salt air is expected.

What is a brad head, and why use it for finishing work?

A brad head is a nail head that is only marginally larger than the shank diameter - in this case, 0.148 in. compared to the 0.113 in. shank. This slim profile means the head can be driven just below the wood surface (countersunk) and covered with wood filler or putty, leaving a surface that shows no visible fastener. It is the standard choice for trim, casing, and finish carpentry where aesthetics are a priority.

What applications are these 2-1/2" finishing nails best suited for?

The 8d, 2-1/2" length is well-suited for attaching finish trim such as door and window casing, baseboards, crown molding, and exterior wood trim. The smooth shank and diamond point make driving clean and accurate, while the 316 stainless steel construction makes these nails equally appropriate for interior finish work or exposed exterior applications in corrosive or high-humidity conditions.

Can these nails be driven by hand, or do they require a pneumatic nailer?

These are collation-free, individual finishing nails suitable for hand nailing with a standard hammer or nail set. The smooth shank and diamond point allow them to drive cleanly by hand, and the brad head can be set below the surface using a nail punch - a common technique in trim carpentry for a clean, concealable finish.

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