Overview

These U-bolts represent a family of high-strength fasteners, all sharing the core characteristics of being made from carbon steel, hot-dip galvanized for superior corrosion protection, and supplied with corresponding nuts. The key differentiator lies in their strength grades: 5.8, 6.8, and 8.8. These grades specify increasing levels of tensile strength and yield strength, allowing for selection based on the required load-bearing capacity and application demands. The “U” shape (which can be round or square depending on the specific product) is designed to secure components to support structures efficiently.

Application

• Grade 5.8:
  • General Construction: Light to medium duty structural fastening, securing less critical components, or in applications with moderate load requirements, such as attaching non-load-bearing elements.
  • Fencing and Outdoor Structures: Attaching fence posts, securing gates, mounting signs, and other outdoor applications where good corrosion resistance is needed but extreme strength isn’t paramount.
  • Minor Electrical/HVAC Installations: Securing electrical conduits, smaller pipes, or ductwork in outdoor or damp environments.
• Grade 6.8:
  • Medium-Duty Industrial and Infrastructure: A common choice for supporting pipelines, cable trays, and general structural components in industrial plants, port facilities, and utility installations.
  • Automotive Chassis and Suspension (Non-Critical): Used in certain areas of truck frames, trailer chassis, or aftermarket accessory mounting where significant, but not extreme, loads are present.
  • Agricultural Equipment: Securing various components on farm machinery and implements exposed to environmental conditions.
• Grade 8.8:
  • Heavy Construction and Structural Engineering: Essential for high-load applications like securing heavy steel beams, bridge components, large pipelines, and critical framework where maximum strength and structural integrity are crucial.
  • Heavy-Duty Vehicle Applications: Widely used in truck chassis, heavy equipment frames, suspension systems, and exhaust systems, particularly where high stress and vibration are encountered.
  • Mining and Offshore Structures: Critical for securing equipment and structural elements in environments demanding the highest levels of strength and fatigue resistance in addition to corrosion protection.

Feature

• Graded Strength (5.8, 6.8, 8.8):
  • Grade 5.8: Offers a minimum tensile strength of 500 MPa and a minimum yield strength of 400 MPa. Suitable for general-purpose, non-critical applications.
  • Grade 6.8: Provides improved mechanical properties with a minimum tensile strength of 600 MPa and a minimum yield strength of 480 MPa, ideal for medium-duty structural components.
  • Grade 8.8: Represents high-strength structural bolting, with a minimum tensile strength of 800 MPa and a minimum yield strength of 640 MPa. This grade is critical for applications requiring significant load-bearing capacity and resistance to fatigue.
• Hot-Dip Galvanization (HDG): Across all grades, the HDG coating provides an exceptionally robust and long-lasting defense against rust and atmospheric corrosion. The zinc layer forms a metallurgical bond with the steel and offers cathodic (sacrificial) protection, significantly extending the service life of the bolts in outdoor, humid, or mildly corrosive industrial environments.
• Carbon Steel Construction: Provides a cost-effective base material for achieving the specified strength grades. Carbon steel is easily formed into U-bolt shapes and readily accepts the hot-dip galvanization process.
• Supplied with Nuts: These U-bolts typically come with corresponding hot-dip galvanized nuts (often heavy hex nuts) that are compatible with the bolt’s strength grade and thread type. This ensures a complete, secure fastening solution with consistent corrosion protection.
• Versatile “U” Shape: Whether round or square, the U-bolt design allows for rapid and secure clamping of various components (pipes, channels, frames, etc.) to support structures, providing a strong grip and preventing movement.