Simpson 4d x 1-1/2" Annular Ring Shank Roofing Nail in 304 Stainless Steel is engineered for demanding roofing applications where holding power and long-term corrosion resistance are non-negotiable. Manufactured by Simpson, this 11-gauge stainless steel roofing nail features an annular ring shank that bites aggressively into wood substrates, dramatically increasing withdrawal resistance compared to smooth-shank alternatives. The full round head provides a broad bearing surface that firmly secures roofing materials - from standard shingles to heavier tile installations - while the Type 304 stainless steel construction delivers superior protection against rust, moisture, and the corrosive conditions commonly encountered in roofing environments. Whether you are fastening roofing felt, shingles, or lightweight roofing panels to plywood roof decks, this nail is built to hold securely over the long term.

Key Features

• Type 304 Stainless Steel construction - delivers superior corrosion resistance in wet, coastal, and outdoor roofing environments where ordinary galvanized or carbon steel fasteners would degrade prematurely
• 11-gauge shank diameter (0.12") - provides the structural thickness needed to penetrate roofing materials cleanly and anchor firmly into wood decking without splitting
• Annular ring shank design - the ring pattern grips wood fibers on all sides, significantly increasing withdrawal resistance so fastened materials stay secured even under wind uplift or thermal movement
• Full round head with 0.375" diameter - the large flat head spreads bearing load across a wide surface area, preventing pull-through on roofing materials and ensuring a secure, lasting hold
• Diamond point tip - enables clean, precise penetration into roofing substrates, reducing splitting risk and making driving faster and more consistent
• Smooth head pattern - provides a low-profile, flush finish that does not interfere with overlapping roofing layers or cause irregularities in the finished surface
• 4d penny size at 1-1/2" length - sized appropriately for standard roofing applications, offering the right penetration depth to anchor into roof decking without over-driving
• Approximately 170 nails per pound - a high count per pound makes these nails economical to use and easy to estimate quantity needs for roofing projects

Why This Product

• Built for corrosive roofing environments - Type 304 stainless steel is specifically chosen for applications where exposure to rain, humidity, and atmospheric moisture would corrode standard fasteners, making these nails a reliable long-term solution for exterior roofing work
• Annular ring shank solves the pull-out problem - unlike smooth-shank roofing nails that can gradually back out under wind loads or seasonal wood movement, the ring shank pattern mechanically locks into wood fibers to maintain a secure connection throughout the life of the roof
• Engineered by a trusted fastener brand - Simpson brings dedicated fastener engineering expertise to this nail, ensuring the geometry of the head, shank, and point work together to perform as specified in real-world roofing conditions
• Made in the United States - domestic manufacturing supports consistent quality control and reliable material sourcing for professionals who depend on fastener performance on every job

Specifications

• Brand: Simpson Strong-Tie
• Coating/Material: Type 304 Stainless Steel
• Gauge: 11
• Penny Size: 4d
• Length: 1-1/2 in.
• Head Diameter: 0.375 in.
• Shank Diameter: 0.12 in.
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Pattern: Smooth Head
• Point Type: Diamond Point
• Approx. Count per Lb.: 170
• Country of Origin: United States

Available Pack Options

• S411ARN1: 1 Lb
• S411ARN5: 5 Lb
• S411ARNB: 25 Lb

Frequently Asked Questions

What is the difference between an annular ring shank and a smooth shank roofing nail?

An annular ring shank features a series of rings along the shank that lock into wood fibers as the nail is driven, dramatically increasing withdrawal resistance compared to a smooth shank. This means the nail is far more resistant to being pulled back out by wind uplift, thermal expansion, or movement in the roof deck over time - making it the preferred choice for applications where long-term holding power is critical.

Why is Type 304 stainless steel used for roofing nails?

Type 304 stainless steel provides superior corrosion resistance against moisture, rain, and the outdoor atmospheric conditions that roofing fasteners are constantly exposed to. Unlike carbon steel or lower-grade galvanized nails that can rust and stain roofing materials, 304 stainless steel maintains its integrity in wet and humid environments, extending the service life of both the fastener and the roofing installation.

What does the full round head design do for a roofing nail?

The full round head with a 0.375" diameter provides a wide, flat bearing surface that distributes clamping force across a broader area. This prevents the nail head from pulling through or punching into soft roofing materials, ensuring the fastener holds the material firmly in place without damaging it. The smooth head pattern also allows overlapping roofing layers to sit flat without interference.

Is this nail suitable for use with plywood roof decks?

Yes. The annular ring shank design is specifically engineered to provide strong withdrawal resistance when driven into wood members and plywood roof decks. The 1-1/2" length and 11-gauge shank diameter are well matched to standard roofing fastening tasks where reliable penetration and grip in plywood substrates are required.

Note: Product dimensions may differ from picture.