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American Standard A194 Heavy Hex Nuts Grade 2H Manufacturer In China

Ningbo Teng Qi Fasteners Co., Ltd is a leading American Standard A194 grade 2H heavy hex nuts manufacturer in China. The ASTM A194 specification covers a range of high-strength nuts intended for use in conjunction with high-strength bolts or studs in structural and mechanical applications. The “2H” designation in A194 Heavy Hex Nuts refers to the specific grade of the nut. These nuts are made from medium carbon alloy steel and are heat-treated to achieve a specified hardness level. The heat treatment process involves quenching and tempering, which enhances the nut’s strength and durability. A194 Heavy Hex Nuts are commonly used in industries such as oil and gas, power generation, and chemical processing, where robust and reliable connections are required. They are often paired with bolts or studs that meet the ASTM A193 B7 specification, which is a high-strength alloy steel fastener standard.

The A194 2H heavy hex nuts provide a larger bearing surface, reducing the stress concentration and improving load distribution. This design feature helps prevent deformation or damage to the connected components under high-pressure or high-temperature conditions.

As a leading manufacturer of A194 heavy hex nuts, we are committed to delivering excellence in quality, reliability, and performance. Our extensive range of products, precision manufacturing processes, and dedication to customer satisfaction make us the preferred choice for those seeking top tier fastening solutions. Explore the durability, strength, and versatility of A194 2H heavy hex nuts for your critical projects.

American Standard A194 2H Black Oxidation Heavy Hex Nuts
American Standard A194 Grade 2H Hot Dip Galvanized Heavy Hex Nuts


1. Diameter: The diameter of an A194 heavy hex nut refers to the size of the nut’s threaded hole. It is typically specified using a measurement like 1/2″, 5/8″, or 3/4″, indicating the inner diameter.

2. Grade: The grade 2H of an A194 heavy hex nut signifies its strength and material properties.

3. Material: These nuts are commonly made from carbon steel or alloy steel, depending on the grade, to meet specific strength and performance requirements.

4. Surface Treatment: Surface treatment refers to any coating or finish applied to the outer surface of the nuts

Product nameA194 Grade 2H Heavy Hex Nuts
StandardASTM A194
Materials:C45 STEEL
Proof Load Stress:175KSI
Marking:2H+Customer Brand
Dimension:ASME B 18.2.2, ASME B
Surface treatment:Black Oxide Coating/Zinc Plating (Electroplating)/Hot-Dip Galvanizing/Mechanical Galvanizing/Dacromet Coating/Painting or Powder Coating
Application IndustryConstruction/Bridges/Industrial Structures/Equipment and Machinery/Infrastructure

Chemical Composition for A194 2H Heavy Hex Nuts:

Chemical ElementsComposition
Carbon0.15 Min
Manganese1.00 Max
Phosphorus0.04 Max
Sulfur0.05 Max
Silicon0.4 Max

Proof Load:

Norminal SizeThread Per InchProof Load,lbf (Heavy Hex)Proof Load,lbf (Hex)
1 1/8″8138200118500
1 1/4″8175000150000
1 3/8″8215800185000
1 1/2″8261100223800

Application of A194 Heavy Hex Nuts:

A194 heavy hex nuts are heavy hex nuts that are typically used in high-pressure and high-temperature applications. These nuts are made from carbon steel and have been heat-treated to achieve a specified hardness level. They are commonly used in conjunction with A193 B7 studs or bolts in industries such as oil and gas, power generation, and chemical processing.

The A194 heavy hex nuts offer excellent strength and durability, making them suitable for demanding environments where the joint must withstand extreme conditions. Their heavy hex design provides a larger bearing surface, distributing the load more evenly and reducing the risk of deformation or damage to the connected components.

These nuts are often employed in flange connections, where they help secure the flange to the pipe or equipment by applying the necessary clamping force. By using A194 heavy hex nuts in combination with A193 B7 studs or bolts, engineers can ensure reliable and robust connections that can withstand high stress and temperature variations.

ASTM A194 Heavy Hex Nut Gr.2H Wholesale Price (blackening oxidation):

Norminal Size  Thread Per Inch MOQ USD Price/1000pc Weight/1000pcs
1/4″ 20 200000 10.5 5.3
5/16″ 18 130000 15 7.82
3/8″ 16 70000 27 14.3
7/16″ 14 53000 36 18.9
1/2″ 13 33700 56 29.7
9/16″ 12 27000 70 37
5/8″ 11 18500 103 54
3/4″ 10 11500 168 87.5
7/8″ 9 7500 258 134.7
1″ 8 5200 368 192.8
1 1/8″ 8 3700 515 268.5
1 1/4″ 8 2800 682 356.5
1 3/8″ 8 2200 885 462.7
1 1/2″ 8 1700 1135 594.2
    • The price of steel fluctuates frequently. Please contact us for more specific price.

Manufacturing Quality Control of A194 Heavy Hex Nut Gr.2H:

Control MethodDetail
Material Inspection:Verify the material's composition, heat treatment, and quality upon receipt. Conduct metallurgical analysis to ensure the material properties meet the standards.
Process Control:Implement strict process control measures for heat treatment, machining, threading, and any other manufacturing steps. Maintain consistent process parameters to ensure uniform quality.
Inspection Points:Introduce inspection points at various stages of manufacturing to check for defects, dimensions, and quality. Inspect threading, dimensions, surface finish, and other critical parameters.
Sampling and Testing:Regularly sample products for testing, such as tensile testing, hardness testing, and metallurgical analysis, to ensure they meet the required specifications.
Thread Inspection:Thoroughly inspect threading using proper thread gauges to ensure accurate dimensions and fit with mating components.
Traceability:Implement a traceability system to track each fasteners journey from raw material to final product. This aids in accountability and recalls if necessary.