Simpson 16d x 3-1/2" Annular Ring Shank Box Nail in 316 Stainless Steel is a premium fastener built for demanding outdoor and coastal construction applications. Crafted by Simpson from Type 316 stainless steel - the grade recognized for superior resistance to saltwater, moisture, and corrosive environments - this 10-penny nail delivers a secure, long-lasting hold in structural and finish carpentry work where corrosion is a constant concern. The annular ring shank design bites deep into wood fibers, dramatically increasing withdrawal resistance compared to smooth-shank alternatives, making it a dependable choice for decking, siding, and permanent wood foundation construction.

Key Features

• Type 316 stainless steel construction - provides superior corrosion resistance in seaside, saltwater-exposed, and high-moisture environments, outlasting standard steel or lower-grade stainless fasteners in harsh conditions
• Annular ring shank design - the rings grip wood fibers tightly to increase withdrawal resistance, keeping fastened materials locked securely in place even under stress, movement, or repeated moisture cycling
• Checkered full round head pattern - blends with wood grain for a cleaner appearance, reduces glare from sunlight, and accepts surface finishes so nails can be stained or painted to match the surrounding material
• Diamond point tip - drives cleanly into wood with less splitting, reducing waste and improving installation efficiency on job sites
• 3-1/2" length (16d / 10-penny size) with 0.131" shank diameter - sized for box nail applications that require deep penetration and a strong hold without the added bulk of a common nail, ideal for framing, sheathing, and deck boards
• Recommended for permanent wood foundation construction - meets the application requirements outlined by the ANSI/AF&PA Permanent Wood Foundations Design Specifications, giving builders confidence in code-relevant projects

Why This Product

• Engineered for coastal and seaside environments - Type 316 stainless steel is the go-to material where saltwater spray, humidity, and chemical exposure would rapidly degrade standard fasteners. Using the right grade upfront prevents premature corrosion, staining of wood surfaces, and costly callbacks.
• Holds tighter over time - the annular ring shank mechanically locks into surrounding wood fibers, resisting the pull-out forces that occur when lumber expands and contracts with seasonal moisture changes, making it a smarter choice than smooth-shank alternatives for outdoor assemblies.
• Finish-friendly head design - the checkered pattern on the full round head accepts stain and paint, so nails can be concealed to match decking, siding, or trim finishes - an important detail for visible exterior applications.
• American-made quality - produced in the United States and backed by the Simpson brand's reputation in the building products industry, these nails are built to consistent standards for professional construction use.

Specifications

• Brand: Simpson Strong-Tie
• Material / Coating: Type 316 Stainless Steel
• Nail Size: 16d (10 Penny)
• Length: 3-1/2 in.
• Head Diameter: 2/7 in.
• Shank Diameter: 0.131 in.
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Pattern: Checkered
• Point Type: Diamond Point
• Approx. Count per Lb.: 67
• Country of Origin: United States

Available Pack Options

• T16ABN1: 1 Lb (67)
• T16ABN5: 5 Lb (335)
• T16ABNB: 25 Lb (1675)

Frequently Asked Questions

What makes Type 316 stainless steel better than Type 304 for outdoor nailing applications?

Type 316 stainless steel contains higher levels of molybdenum compared to Type 304, which gives it superior resistance to saltwater, chlorides, and chemical corrosion. Simpson specifically recommends Type 316 for seaside applications and environments with elevated corrosion exposure - such as coastal decks, docks, and marine structures - where Type 304 may not provide adequate long-term protection.

What is an annular ring shank and why does it matter?

An annular ring shank features a series of ridges or rings running along the nail's body. These rings interlock with surrounding wood fibers as the nail is driven, creating mechanical resistance against pull-out forces. This significantly increases withdrawal resistance compared to smooth-shank nails - an important advantage in applications like decking and siding where movement from moisture cycling can work nails loose over time.

Are these nails appropriate for permanent wood foundation construction?

Yes. Simpson stainless steel annular ring shank box nails are recommended for the construction of permanent wood foundations in accordance with the ANSI/AF&PA Permanent Wood Foundations Design Specifications. Always verify the specific fastener requirements for your project with the applicable design specification or a qualified engineer.

Can the checkered head be painted or stained to match the surrounding wood surface?

Yes. The checkered pattern on the full round head is specifically designed to accept surface finishes including paint and stain. This makes these nails well-suited for visible exterior applications - such as decking, trim, and siding - where a consistent finished appearance matters. The pattern also reduces glare from direct sunlight, which is a practical benefit in bright outdoor environments.

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