IMSCREWS 3/8"-16 x 1-1/4" Heavy-Duty 304 Stainless Steel Carriage Bolts (5 PCS)

Substantial Strength for Heavy-Duty Structural and Marine Connections
The IMSCREWS 3/8" x 1-1/4" carriage bolt is engineered for structural projects requiring maximum shear resistance and a low-profile finish. With a robust 3/8-inch diameter and a precision 1.25-inch length, these bolts are the ideal choice for securing heavy-duty industrial brackets, dock hardware, and thick metal plates to timber. Built for durability, they provide the necessary stability for high-load joints in both residential and demanding marine applications where a snug and reliable connection is critical.

High Durability and Safety-Focused Design
Forged from premium 18-8 (304) stainless steel, these fasteners are highly resistant to rust and corrosion, even when exposed to salt air or humid conditions. The smooth round head offers a clean, tamper-resistant appearance that reduces snagging hazards, making them a safe choice for public walkways, benches, and residential decks. The integrated square neck prevents the bolt from spinning during installation, allowing for easy, one-sided fastening with a single wrench from the nut side.

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 structural load and protect material surfaces.

Key Features

• Heavy-Duty 3/8 Diameter: The thick 3/8-inch shank is engineered for maximum load-bearing capacity and superior shear resistance, making it ideal for high-stress structural joints.
• Compact 1.25-Inch Length: Designed forly sized for joining 1/2 boards or securing 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 air, marine docks, and harsh outdoor environments.
• Tamper-Resistant Security: The smooth, drive-free round head prevents unauthorized removal from the exterior, making it a secure choice for public benches, gates, and signage.
• Self-Locking Square Neck: The precision-engineered square shoulder bites firmly into wood, locking the bolt in place so you can tighten the nut from the back with a single wrench.

Specifications

• ASIN: B0F2F6DTDP
• Internal SKU: IMS0834
• Size: 3/8"-16 x 1-1/4"
• Material: Stainless Steel
• Finish: Stainless Steel
• Head Style: Round
• Package Quantity: 5