IMSCREWS 3/8"-16 x 5" Heavy-Duty 304 Stainless Steel Carriage Bolts (10 PCS)

Substantial Support for Deep Structural Connections
The IMSCREWS 3/8" x 5" carriage bolt is engineered for projects requiring maximum penetration and stable structural support. 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 standard 4x4 posts to support beams or reinforcing heavy deck-to-post connections. Built for durability, they offer the stability necessary for long-term use in outdoor structures, retaining walls, and industrial garden projects.

High Durability and Safety-Focused Design
Forged from 18-8 (304) stainless steel, these fasteners are highly resistant to corrosion in outdoor environments and are compatible with pressure-treated lumber. The smooth round head offers a clean appearance that reduces snagging hazards, making them an ideal choice for high-traffic areas like railings, play sets, and heavy-duty benches. The integrated square neck prevents rotation, allowing for easy, one-sided installation with a single wrench from the nut side.

Specifications:
- Thread: 3/8"-16 Coarse; Length: 5" (Under Head)
- Material: 304 (18-8) Stainless Steel; Full Thread

FAQ:
Q: Drill bit size? A: A 3/8" bit provides a snug, structural fit.
Q: Outdoor safe? A: Yes, 304 SS offers high resistance to rust and salt air corrosion.

Pro-Tips:
1. Ensure the pilot hole is perfectly perpendicular for 5" bolts to avoid alignment issues in thick timber.
2. Pair with a heavy-duty flat washer on the nut side to distribute structural load and protect wood fibers.

Key Features

• Self-Locking Square Neck: Designed with a precision-forged square neck beneath the head that bites into wood or locks into square metal holes, preventing the bolt from spinning while the nut is tightened.
• Full Thread Maximum Grip: Features a fully threaded shank that provides maximum grip and enhanced fastening power along the entire 5-inch length, ideal for deep timber projects and heavy-duty DIY.
• 304 Marine Grade Stainless: Forged from premium 18-8 (304) Stainless Steel for superior corrosion defense. Essential for outdoor structures, coastal decks, docks, and ACQ pressure-treated lumber.
• Heavy-Duty Structural Strength: The 3/8 diameter provides professional-grade shear resistance. The extended 5 length is Well-suited for through-bolting thick posts, garden sleepers, and large beams.
• Snag-Free Aesthetic Finish: The smooth, domed round head provides a professional, low-profile finish without sharp edges, ensuring safety and aesthetics for fencing, playground sets, and outdoor furniture.

Specifications

• ASIN: B0F2F5F9SQ
• Internal SKU: IMS0869
• Size: 3/8"-16 x 5"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Round
• Package Quantity: 10