Simpson 4d x 1-1/2" Annular Ring Shank Roofing Nail in Type 316 Stainless Steel is engineered for demanding roofing applications where corrosion resistance and long-term holding power are essential. Built from 11-gauge Type 316 stainless steel, this roofing nail delivers reliable performance in coastal environments, high-moisture conditions, and applications involving chemically treated materials. The annular ring shank bites into wood fibers for exceptional withdrawal resistance, while the full round head distributes load evenly across roofing surfaces to keep materials firmly secured over years of exposure.

Key Features

• Type 316 stainless steel construction - provides superior resistance to saltwater, moisture, and corrosive environments, making it a trusted choice for coastal and marine roofing projects
• Annular ring shank design - dramatically increases withdrawal resistance compared to smooth-shank nails, locking the fastener in place within wood members and plywood roof decks to resist wind uplift and long-term movement
• Full round head with smooth head pattern - distributes bearing force broadly across roofing materials, reducing the risk of pull-through and keeping shingles, felt, and underlayments firmly in place
• 11-gauge shank at 0.12" diameter - delivers a strong, rigid drive through roofing substrates while minimizing splitting in thinner decking materials
• 1-1/2" length (4d penny size) - sized appropriately for standard roofing applications including felt underlayment and shingle attachment to roof decking
• Diamond point tip - enables clean, accurate penetration through roofing materials with minimal effort, reducing installer fatigue during repetitive nailing
• Made in the United States - domestic manufacturing supports consistent quality standards and traceability for professional roofing contractors

Why This Product

• Built for corrosive and high-moisture environments - Type 316 stainless steel is the go-to alloy for roofing in coastal, waterfront, or chemically active settings where standard galvanized fasteners would degrade prematurely, causing staining and fastener failure
• Engineered for maximum holding power - the annular ring shank increases withdrawal resistance far beyond what a smooth-shank nail provides, making this nail well-suited for high-wind zones and roof decks that experience thermal movement
• Trusted Simpson brand quality - Simpson Strong-Tie is a recognized name in structural fasteners and connectors, and this roofing nail is designed and manufactured to the same performance standards expected from the brand
• Versatile roofing fastener for professional use - the combination of a full round head, annular shank, and diamond point makes this nail adaptable for attaching shingles, underlayment, and roofing materials to plywood and wood roof deck substrates

Specifications

• Brand: Simpson Strong-Tie
• Coating/Material: Type 316 Stainless Steel
• Gauge: 11
• Penny Size: 4d
• Length: 1-1/2 in.
• Head Diameter: 0.34375 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

• T411ARN1: 1 Lb
• T411ARN5: 5 Lb
• T411ARNB: 25 Lb

Frequently Asked Questions

What makes Type 316 stainless steel better for roofing applications than standard fastener materials?

Type 316 stainless steel contains molybdenum, which gives it enhanced resistance to chlorides, saltwater, and chemical exposure compared to lower-grade alloys. For roofing in coastal areas or environments with elevated moisture, this means the fastener maintains structural integrity and appearance over time without rusting, staining, or corroding through roofing materials.

Why does this nail use an annular ring shank instead of a smooth shank?

The annular ring shank features a series of rings along the shank that grip the surrounding wood fibers as the nail is driven in. This mechanical interlock significantly increases withdrawal resistance compared to smooth-shank nails, keeping roofing materials tightly secured to the deck even under wind uplift forces or material movement caused by temperature changes.

What type of roofing substrate is this 1-1/2" nail designed to work with?

This 4d x 1-1/2" roofing nail is suited for attachment of roofing materials such as shingles and underlayment to wood members and plywood roof decks. The 1-1/2" length and 11-gauge shank provide sufficient penetration and holding power for standard thickness roofing substrates.

How many nails are there per pound, and why does that matter for planning a roofing job?

There are approximately 170 nails per pound for this size and gauge. Knowing the count per pound allows roofing contractors and builders to accurately estimate the total quantity needed for a project based on coverage area and fastening schedule, helping to minimize waste and avoid material shortfalls mid-job.

Note: Product dimensions may differ from picture.