IMSCREWS 3/8"-16 x 3" Heavy-Duty 304 Stainless Steel Carriage Bolts (2 PCS)

Substantial Strength for Heavy Structural and Marine Connections
The IMSCREWS 3/8" x 3" carriage bolt is engineered for structural projects requiring significant load-bearing capacity and professional-grade durability. With a robust 3/8-inch diameter and a precise 3-inch length, these bolts are the ideal choice for joining heavy timber sections or securing thick structural plates. This specific length is perfectly calculated to pass through two layers of standard 2x lumber (actual 1.5" thickness each), providing a snug connection while leaving enough thread for heavy-duty washers and nuts. Built for longevity, they offer the stability required for outdoor pergolas, heavy fencing, and commercial-grade timber framing.

Superior Durability and Safety-Focused Design
Forged from premium 18-8 (304) stainless steel, these fasteners offer superior resistance to rust and corrosion, even when exposed to harsh coastal or humid environments. The smooth round head creates a clean, tamper-resistant look that reduces snagging hazards, making them a safe choice for high-traffic areas like playground sets, park benches, and residential decks. The integrated square neck locks the bolt into place during installation, preventing spinning and allowing for easy, one-sided tightening from the nut side with a single wrench.

Specifications:
Thread Size: 3/8"-16 Coarse (UNC); Length: 3" (Measured from Under Head); Material: 304 (18-8) Stainless Steel; Full Thread

Pro-Tips:
1. Use a 3/8" drill bit to ensure a snug, structural fit for the square neck.
2. Pair with 304 SS flat washers and hex nuts on the nut side to distribute heavy structural loads and protect wood fibers.

Key Features

• Structural 3/8 Support: Heavy-duty 3/8 diameter provides industrial-grade shear resistance for critical timber-to-timber or timber-to-metal joints.
• 3-Inch Deep Reach: The extended 3-inch length is ideal for joining thick 4x4 posts or securing heavy components to standard outdoor lumber.
• Premium Marine-Grade 304: Forged from 18-8 stainless steel for maximum corrosion resistance in coastal environments and pressure-treated wood.
• Safety Rounded Finish: The smooth domed head eliminates sharp snags, ensuring a child-safe, professional look for playgrounds and garden furniture.
• Effortless 2-Pack Utility: Well-suited for precision repairs, specific DIY upgrades, or replacing old hardware without the waste of bulk buying.

Specifications

• ASIN: B0F2F72SQJ
• Internal SKU: IMS0855
• Size: 3/8"-16 x 3"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Round
• Package Quantity: 2