Simpson 1-1/2 in. 4d Annular Ring Shank Common Nail in Type 316 Stainless Steel is a corrosion-resistant fastener built for demanding exterior and seaside construction applications. Manufactured by Simpson Strong-Tie and made in the United States, this 9-gauge nail features an annular ring shank that bites into wood fibers to dramatically increase withdrawal resistance - delivering a more secure, long-lasting connection than smooth-shank alternatives. Whether you are fastening wood framing or joining structural members outdoors, the Type 316 stainless steel composition provides superior resistance to saltwater, chemicals, and harsh coastal environments where standard fasteners would corrode and fail prematurely.

Key Features

• Type 316 Stainless Steel Material - provides superior corrosion resistance in seaside, coastal, and chemically aggressive environments, making it ideal for exterior and permanent outdoor construction
• Annular Ring Shank - the ringed shank profile locks into wood fibers to increase withdrawal resistance, keeping connections tight even under repeated stress and seasonal movement
• 9-Gauge Wire Diameter (0.148 in. shank) - a heavier gauge wire delivers greater shear strength compared to lighter-gauge fasteners, supporting structural integrity in wood framing applications
• Full Round Head (5/16 in. diameter) - maximizes bearing surface against the wood face to distribute load evenly and reduce the risk of the nail pulling through under tension
• Diamond Point Tip - the sharp, four-sided point penetrates wood cleanly with less splitting, speeding up installation and protecting the integrity of the material being fastened
• 4d / 1-1/2 in. Length - a compact length suited to fastening thinner stock and surface materials where a longer nail would penetrate too deeply or cause blowout
• Made in the United States - domestically produced to consistent quality standards, supporting traceability and compliance documentation on commercial and residential projects

Why This Product

• The right choice for coastal and seaside projects: Type 316 stainless steel offers a higher level of chloride and saltwater resistance than Type 304 stainless or standard galvanized fasteners - making it the preferred option wherever marine exposure is a concern
• Engineered for maximum holding power: the annular ring shank increases withdrawal resistance beyond what smooth or spiral shank nails can achieve, reducing the risk of connections loosening over time in wood-to-wood framing assemblies
• Minimizes splitting risk during installation: the diamond point tip displaces wood fibers cleanly rather than wedging them apart, preserving structural integrity in the surrounding lumber and reducing waste from cracked boards
• Trusted brand for structural fastening: Simpson Strong-Tie designs fasteners specifically to meet the performance demands of exterior and structural construction, so you can rely on consistent dimensional quality and material specification across every nail

Specifications

• Brand: Simpson Strong-Tie
• Finish: Type 316 Stainless Steel
• Material: Type 316 Stainless Steel
• Gauge: 9
• Penny Size: 4d
• Length: 1-1/2 in.
• Head Type: Full Round Head
• Head Diameter: 5/16 in.
• Shank Type: Annular-Ring Shank
• Shank Diameter: 0.148 in.
• Point Type: Diamond Point
• Approx. Count Per Lb: 130
• Country of Origin: United States

Available Pack Options

• T4HACN1: 1 Lb (130)
• T4HACN5: 5 Lb (650)
• T4HACNB: 25 Lb (3250)

Approved Applications

• Fastening Wood-to-Wood
• Framing - Wood

Frequently Asked Questions

Why choose Type 316 stainless steel over Type 304 for exterior nails?

Type 316 stainless steel contains higher levels of molybdenum compared to Type 304, which gives it greater resistance to chlorides and saltwater corrosion. Simpson Strong-Tie specifically recommends Type 316 for seaside applications and environments where superior corrosion resistance is required - situations where Type 304 may corrode prematurely.

What is the advantage of an annular ring shank over a smooth shank nail?

The annular ring shank features a series of ridges along its length that interlock with wood fibers as the nail is driven. This mechanical engagement significantly increases withdrawal resistance - meaning the nail resists being pulled back out far more effectively than a smooth shank nail of the same size, resulting in a more secure and durable connection over time.

What does 4d / 1-1/2 in. mean for this nail?

"4d" is the traditional penny size designation for this nail, which corresponds to a physical length of 1-1/2 in. The penny sizing system is a historical standard still widely used in the construction industry to quickly identify nail length. At 1-1/2 in., this nail is well suited for fastening thinner wood members together in wood-to-wood and framing applications.

How many nails are in one pound of this product?

There are approximately 130 nails per pound for this 9-gauge, 1-1/2 in. Type 316 stainless steel annular ring shank nail. This count can be useful for estimating how many pounds you need for a given project based on your planned fastener layout and spacing.