IMSCREWS 3/8"-16 x 5" Extra-Long 304 Stainless Steel Carriage Bolts (2 PCS)

Substantial Strength for Deep Structural Timber Connections
The IMSCREWS 3/8" x 5" carriage bolt is engineered for heavy-duty structural projects requiring maximum shear resistance and deep penetration. With a robust 3/8-inch diameter and an extended 5-inch length, these bolts are well-suited for high-load joints where stability is critical, such as through-bolting multi-layered dimensional lumber or securing heavy-duty brackets to thick beams. Built for durability, they offer the stability necessary for long-term use in outdoor structures, garden gazebos, and industrial woodworking projects.

High Durability and Safety-Focused Design
Forged from premium 18-8 (304) stainless steel, these fasteners are highly resistant to rust and corrosion in coastal or humid environments. The smooth round head offers a clean appearance that reduces snagging hazards, making them an ideal choice for visible railings, play sets, and heavy-duty benches. The integrated square neck prevents the bolt from spinning, allowing for easy, one-sided installation with a single wrench from the nut side.

Specifications:
- Thread Size: 3/8"-16 Coarse (UNC); Length: 5" (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 stainless steel flat washers and nuts on the nut side to distribute structural load and protect wood fibers.

Key Features

• Structural Grade Strength: The robust 3/8-inch diameter provides superior shear resistance and clamping force, making these bolts ideal for critical load-bearing joints in heavy timber framing.
• Full 5-Inch Reach: Engineered for through-bolting thick structural posts and multi-layer beams, this extended length ensures a rock-solid connection where standard bolts fall short.
• Marine-Grade Corrosion Defense: Forged from 18-8 (304) stainless steel, these fasteners are immune to rust in coastal air and highly compatible with corrosive ACQ pressure-treated lumber.
• Self-Locking Anti-Spin Neck: The precision square neck bites deep into wood fibers, preventing the bolt from rotating while you apply high torque to the nut¡ªideal for one-sided installation.
• Safe, Snag-Free Aesthetic: The smooth, domed round head eliminates sharp edges and exposed drive slots, providing a clean professional look that is safe for playgrounds, docks, and furniture.

Specifications

• ASIN: B0F2F6HN4M
• Internal SKU: IMS0867
• Size: 3/8"-16 x 5"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Round
• Package Quantity: 2