Simpson 8d 0.131 x 2-1/2" Preservative-Treated Wood Decking Nail in Type 304 Stainless Steel by Simpson Strong-Tie is a purpose-built exterior fastener engineered for deck and dock construction using preservative-treated lumber. The annular-ring shank design locks into wood fibers for superior withdrawal resistance, helping prevent nail heads from working their way up over time - a common frustration in outdoor decking projects. Built from Type 304 stainless steel, this corrosion-resistant decking nail delivers long-lasting performance in exposed outdoor environments, making your deck or dock as durable as the structure it supports.

Key Features

• Type 304 Stainless Steel material - provides reliable corrosion resistance for exterior and outdoor applications, protecting fastener integrity season after season
• Annular-ring shank - dramatically increases withdrawal resistance compared to smooth-shank nails, helping keep deck boards tight and preventing nail-pop over the life of the structure
• Larger 0.131" shank diameter (10 gauge) - allows for easy penetration into both green and seasoned preservative-treated pine without splitting or excessive resistance
• Full round head with checkered pattern - the textured head blends with wood grain for a cleaner finished appearance and reduces glare from sunlight on your deck surface
• Diamond point - enables easier driving and cleaner entry into treated lumber, reducing installation effort and minimizing wood splitting
• 8d penny size, 2-1/2" length - a proven standard dimension for decking applications, providing adequate holding depth across common deck board thicknesses
• Made in the United States - manufactured domestically by Simpson Strong-Tie, a trusted name in structural fastening solutions

Why This Product

• Designed specifically for preservative-treated lumber - the 10-gauge shank diameter and annular-ring profile are optimized to work with both green and seasoned treated pine, eliminating the guesswork of selecting a general-purpose nail for a demanding application
• Corrosion resistance where it counts - Type 304 stainless steel construction stands up to the harsh outdoor conditions that decks and docks face, including moisture exposure and the chemical environment of pressure-treated wood
• Reduces long-term maintenance - the annular-ring shank's increased withdrawal resistance means boards stay fastened tighter for longer, minimizing the need to reset or replace fasteners over the life of the deck
• From a trusted fastening brand - Simpson Strong-Tie engineered this nail specifically for deck and dock projects, meaning every design detail - head pattern, shank type, point geometry - serves a practical purpose in real exterior construction

Specifications

• Brand: Simpson Strong-Tie
• Material: Type 304 Stainless Steel
• Finish: Type 304 Stainless Steel
• Penny Size: 8d
• Gauge: 10
• Length: 2-1/2 in.
• Shank Diameter: 0.131 in.
• Shank Type: Annular-Ring Shank
• Head Type: Full Round Head
• Head Diameter: 9/32 in.
• Head Pattern: Checkered
• Point Type: Diamond Point
• Approximate Count Per Lb: 94
• Country of Origin: United States

Available Pack Options

• S8HPTD1: 1 Lb (94)
• S8HPTD5: 5 Lb (470)
• S8HPTDB: 25 Lb (2350)

Approved Applications

• Deck construction with preservative-treated pine lumber
• Dock construction and waterfront structures
• Exterior wood fastening in green or seasoned treated lumber
• Outdoor living spaces requiring corrosion-resistant fasteners

Frequently Asked Questions

What type of lumber is this decking nail designed for?

This nail is specifically designed for use in preservative-treated pine lumber, and the 10-gauge, 0.131" shank diameter allows for easy installation into both green (freshly treated) and seasoned (dried) preservative-treated wood without splitting.

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

The annular-ring shank provides significantly increased withdrawal resistance compared to a smooth shank. This means the nail grips the wood fibers more aggressively, helping prevent nail heads from popping up over time - a key performance advantage in outdoor decking and dock applications where boards are subject to repeated moisture cycling and movement.

Is Type 304 stainless steel appropriate for all outdoor decking environments?

Type 304 stainless steel offers strong corrosion resistance suitable for most outdoor deck and dock applications. For seaside or coastal applications where exposure to saltwater and more aggressive corrosive conditions is expected, Type 316 stainless steel is recommended for superior corrosion resistance.

What does the checkered head pattern on this nail do?

The checkered pattern on the full round head serves two practical purposes - it blends with the natural wood grain for a more finished appearance on your deck surface, and it reduces glare from sunlight, making the installed fasteners less visually distracting in bright outdoor conditions.

Note: Product dimensions may differ from picture.