ASME B18.2.6 Heavy Hex Nuts for Structural Applications

At NINGBO DATIAN FASTENER, we ensure that all structural nuts produced for use with ASME B18.2.6 heavy hex structural bolts meet the highest industry standards in terms of dimensions, material properties, and performance. Below are the key specifications for structural nuts used in critical applications:

1. Material Composition:

Structural nuts used with ASME B18.2.6 bolts are typically made from carbon steel or alloy steel. The nuts are designed to meet the mechanical properties and material requirements defined by standards like ASTM A563 and ASTM A194. For higher-strength applications, materials like quenched and tempered steel are used, ensuring durability and the ability to withstand high loads.

• Carbon Steel Nuts: Commonly used in general structural applications, offering good strength and cost-effectiveness.

  
  

• Alloy Steel Nuts: Provide enhanced strength, toughness, and durability, especially in demanding environments where high-stress or extreme temperature conditions exist.

2. Heat Treatment:

Structural nuts, especially those made from Grade DH or Grade 2H materials under ASTM A563 and ASTM A194, are subjected to quenching and tempering heat treatment processes. This ensures that the nuts possess the necessary hardness and tensile strength to handle high-tension loads without deformation or failure.

• Quenching: The nuts are heated to a high temperature and rapidly cooled to increase hardness.

  
  

• Tempering: Following quenching, tempering ensures the nuts retain their strength while improving toughness and reducing brittleness.

3. Corrosion Resistance and Coatings:

To provide additional protection, especially in outdoor and harsh environments, NINGBO DATIAN FASTENER offers structural nuts with various coating options:

• Hot-Dip Galvanized (HDG): This process involves coating the nuts with a thick layer of zinc, which provides excellent corrosion resistance. Hot-dip galvanized nuts are ideal for use in bridges, docks, and other outdoor steel structures exposed to the elements.

  
  

• Zinc Plated: A thinner layer of zinc coating is applied to improve corrosion resistance for less aggressive environments.

  
  

• Plain Finish: For indoor or controlled-environment applications where corrosion is not a major concern.

4. Applications of Structural Nuts:

Our heavy hex structural nuts are essential components in a variety of demanding applications, including:

• Bridges: Structural nuts secure critical connections in steel bridge structures, ensuring long-term stability under dynamic loads.

  
  

• Buildings: Used in steel frameworks, these nuts help create strong, reliable connections between beams and other structural components.

  
  

• Heavy Machinery: In industrial applications, these nuts provide the strength needed for high-stress joints in heavy machinery and equipment.

At NINGBO DATIAN FASTENER, we focus on delivering structural nuts that meet stringent industry standards for quality, performance, and durability. Our nuts are manufactured to provide excellent corrosion resistance, high load-bearing capacity, and precise dimensional accuracy, making them ideal for use in some of the most demanding structural applications. With a commitment to quality and customer satisfaction, our products are designed to help your projects succeed, ensuring reliable connections in every structure.