IMSCREWS 3/8"-16 x 1-1/4" Heavy-Duty 304 Stainless Steel Carriage Bolts (20 PCS)

Industrial Strength for Heavy Structural and Marine Projects
The IMSCREWS 3/8" x 1-1/4" carriage bolt is engineered for heavy-duty structural projects that demand maximum load-bearing capacity and a professional finish. With a robust 3/8-inch diameter and a precise 1.25-inch length, these bolts are the ideal choice for securing industrial brackets, dock hardware, and heavy timber-to-metal connections. The full thread design provides maximum versatility for a snug fit, ensuring structural integrity in both residential construction and demanding industrial or marine applications.

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 outdoor or humid environments. The smooth round head creates a clean, tamper-resistant look that minimizes snagging hazards, making them a safe choice for high-traffic areas like boardwalks, playground sets, and outdoor furniture. The integrated square neck locks the bolt into place, 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: 1-1/4" (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 hex nuts on the nut side to distribute heavy structural loads and protect material surfaces.

Key Features

• Industrial 3/8 Strength: The heavy-duty 3/8-inch shank is engineered for maximum load-bearing and superior shear resistance, making it ideal for high-stress structural joints.
• Compact 1.25-Inch Reach: Designed forly sized for joining 1/2 panels or fastening heavy-duty metal plates to timber where a flush finish is required without excess thread protrusion.
• Marine-Grade 304 Stainless: Forged from premium 18-8 (304) stainless steel, ensuring top-tier rust protection in coastal environments, docks, and humid garden settings.
• Tamper-Resistant Security: The smooth round head features no drive socket, providing a clean professional finish while preventing unauthorized removal from the exterior.
• Self-Locking Square Neck: The precision square shoulder bites firmly into wood, locking the bolt in place so you can tighten the nut from the back with just one wrench.

Specifications

• ASIN: B0F2F4FFZB
• Internal SKU: IMS0836
• Size: 3/8"-16 x 1-1/4"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Round
• Package Quantity: 20