Simpson 3d Cedar Trim Nail in 1-1/4" Type 316 Stainless Steel by Simpson Strong-Tie is a precision-engineered fastener built for finishing, millwork, and trim applications where a clean, low-profile installation and long-term corrosion resistance are essential. Specifically designed to fashion woven corners, this cedar trim nail features an ultra-thin 0.072" wire diameter and a compact 9/64" round head that virtually disappears into the work surface - making it the go-to choice for exterior cedar trim, siding details, and decorative woodwork exposed to the elements. The annular-ring shank delivers superior holding power compared to smooth-shank alternatives, so fastened trim stays secure through seasonal wood movement and outdoor weathering. Whether used in coastal environments or demanding outdoor living spaces, this nail is engineered to provide corrosion-resistant performance that keeps exterior millwork looking great for years.

Key Features

• Type 316 Stainless Steel material - provides superior corrosion resistance compared to standard stainless grades, making this nail a reliable choice for seaside, high-humidity, and chemically exposed outdoor environments where lesser fasteners would rust and stain the trim surface
• Ultra-thin 0.072" shank diameter (15 gauge) - minimizes wood splitting when driven into cedar and other fine-grained trim materials, reducing waste and rework during installation
• 9/64" round head with checkered pattern - the small, unobtrusive head sits nearly flush with the trim surface for a clean finished appearance, while the checkered face improves hammer grip and reduces glancing strikes
• Diamond point tip - the blunt diamond point is engineered to part wood fibers rather than wedge them apart, significantly reducing the risk of shingle or trim splitting during nailing
• Annular-ring shank - the ringed thread profile dramatically increases withdrawal resistance over smooth-shank nails, locking trim securely in place even as wood expands and contracts with moisture changes
• Designed to fashion woven corners - purpose-built geometry supports the specific nailing pattern needed for woven-corner cedar installations, giving finish carpenters and trim crews a fastener that matches the application
• Made in the United States - domestic manufacturing supports consistent material quality and availability for professional contractors and builders

Why This Product

• Purpose-built for cedar woven corners - unlike general-purpose trim nails, this fastener is specifically engineered for woven-corner cedar trim work, combining the right head size, shank diameter, and point geometry to handle this demanding application cleanly and efficiently
• Type 316 stainless steel for coastal and harsh-environment use - when trim installations face saltwater spray, high humidity, or chemical exposure, the Type 316 alloy resists the deep corrosion that can stain cedar and compromise fastener integrity over time - a critical advantage in seaside and outdoor living applications
• Annular-ring shank for lasting hold - finishing nails in exterior trim are subject to pull-out forces from thermal movement and wood swelling; the annular-ring shank mechanically locks into wood fibers, reducing the likelihood of nail pops or trim separation over the life of the installation
• Slim profile protects delicate trim materials - at only 0.072" in diameter with a diamond point, this nail is gentle enough for cedar and fine trim stock where a heavier fastener would cause splitting or surface damage, preserving the appearance of finished millwork

Specifications

• Brand: Simpson Strong-Tie
• Penny Size: 3d
• Length: 1-1/4 in.
• Gauge: 15
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Shank Diameter: 0.072 in.
• Shank Type: Annular-Ring Shank
• Head Diameter: 9/64 in.
• Head Type: Round Head
• Head Pattern: Checkered
• Point Type: Diamond Point
• Approximate Count per Lb.: 550
• Country of Origin: United States

Available Pack Options

• T3ACDRWVR1: 1 Lb (550)
• T3ACDRWVR5: 5 Lb (2750)

Approved Applications

• Finishing, Millwork and Trim

Frequently Asked Questions

Why is Type 316 stainless steel recommended for cedar trim applications?

Cedar contains natural tannins and acids that can react with lower-grade metals, causing staining and accelerated corrosion. Type 316 stainless steel offers a higher level of corrosion resistance than standard 304 stainless, making it especially well-suited for cedar, redwood, and other acidic woods used in exterior trim and millwork - as well as for installations in coastal or high-humidity environments where saltwater exposure is a concern.

What makes the annular-ring shank better for exterior trim than a smooth-shank nail?

The annular-ring shank features a series of rings along the shank that mechanically interlock with wood fibers as the nail is driven. This provides significantly greater withdrawal resistance compared to a smooth-shank nail, which is especially important in exterior applications where wood expands and contracts with seasonal moisture changes. The result is trim that stays firmly fastened over time with less risk of nail pops or loosening.

How does the diamond point help prevent splitting in cedar trim?

The blunt diamond point is designed to part wood fibers as it penetrates, rather than acting like a wedge that forces fibers apart. This reduces internal stress in the wood during driving, which lowers the likelihood of splitting - a common concern when working with narrow cedar trim pieces or when nailing close to an edge.

Is this nail appropriate for woven-corner cedar siding installations?

Yes. This cedar trim nail is specifically designed to fashion woven corners. Its combination of a slim 0.072" wire diameter, small 9/64" round head, and blunt diamond point gives it the profile needed for precise placement in woven-corner cedar work without damaging the wood surface or creating unsightly nail heads.

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