Simpson 5-inch 40d Annular Ring Shank Common Nail in Type 316 Stainless Steel is a heavy-duty fastener engineered for demanding wood framing and wood-to-wood fastening applications. Built from 6-gauge Type 316 stainless steel, these nails deliver exceptional corrosion resistance - standing up to saltwater exposure, harsh coastal environments, and the corrosive chemistry of treated lumber - making them a reliable choice wherever long-term holding power and weather durability are required.

Key Features

• Annular ring shank - increases withdrawal resistance compared to smooth-shank nails, creating a more secure attachment that resists loosening under load, vibration, or seasonal wood movement
• Type 316 stainless steel material - provides superior corrosion resistance in seaside, marine, and high-moisture environments where other metals would oxidize or fail prematurely
• 6-gauge, 0.203-inch shank diameter - delivers the structural strength expected of a common nail in heavy framing applications
• Full round head (7/16 inch diameter) - maximizes bearing surface contact for improved load distribution and pull-through resistance across wood surfaces
• Diamond point tip - enables cleaner nail penetration and reduces the chance of wood splitting during installation
• 5-inch length (40d penny size) - provides deep embedment into framing members for strong, lasting connections in structural wood assemblies
• Made in the United States - manufactured domestically to consistent quality standards for professional-grade construction use

Why This Product

• Built for coastal and high-corrosion environments - Type 316 stainless steel is the recommended choice for seaside and marine applications where standard galvanized fasteners may corrode over time, helping wood structures last as long as intended
• Stronger grip than smooth-shank alternatives - the annular ring shank profile mechanically locks into wood fibers, offering elevated withdrawal resistance that keeps connections tight over the life of the structure
• Appropriate for permanent wood construction - stainless steel fasteners are widely recommended for use in permanent wood foundation construction in accordance with ANSI/AWC Permanent Wood Foundations Design Specifications, and the corrosion-resistant material supports compliance-driven project requirements
• Trusted Simpson Strong-Tie quality - Simpson offers a wide range of exterior fasteners designed to bring the same durability to outdoor construction that you expect from interior structural connections

Specifications

• Brand: Simpson Strong-Tie
• Finish: Type 316 Stainless Steel
• Material: Type 316 Stainless Steel
• Gauge: 6
• Length: 5 in.
• Penny Size: 40d
• Shank Diameter: 0.203 in.
• Shank Type: Annular-Ring Shank
• Head Diameter: 7/16 in.
• Head Type: Full Round Head
• Point Type: Diamond Point
• Approx. Count per Lb.: 19
• Country of Origin: United States

Available Pack Options

• T40ACN1: 1 Lb (19)
• T40ACN5: 5 Lb (95)
• T40ACNB: 25 Lb (475)

Approved Applications

• Fastening Wood-to-Wood
• Framing - Wood

Frequently Asked Questions

Why choose Type 316 stainless steel over Type 304 for outdoor projects?

Type 316 stainless steel offers superior corrosion resistance compared to Type 304, making it the preferred choice for seaside and coastal applications where exposure to salt air, moisture, and harsh environmental conditions is a concern. For projects near the ocean or in high-humidity environments, Type 316 provides a more durable, longer-lasting fastening solution.

What does an annular ring shank do that a smooth shank does not?

The annular ring shank features ridged rings along the length of the nail that mechanically interlock with wood fibers as the nail is driven. This significantly increases withdrawal resistance - meaning the nail resists being pulled back out - compared to a plain smooth shank. The result is a more secure, stable connection that holds up better under load, movement, and vibration over time.

What types of wood framing applications are these nails designed for?

These 5-inch 40d nails are suited for wood-to-wood fastening and structural wood framing applications. The combination of a 6-gauge shank, full round head, and 5-inch length makes them appropriate for heavy framing assemblies where deep embedment and strong withdrawal resistance are important.

How many nails are in a pound?

There are approximately 19 nails per pound for this 5-inch 6-gauge Type 316 stainless steel annular ring shank nail. Use this count to estimate the quantity needed for your project when purchasing by weight.