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A194 2HM Heavy Hex Nut Manufacturer In China

Ningbo Teng Qi Fasteners Co., Ltd is a leading A194 grade 2HM heavy hex nuts manufacturer in China. A194 2HM nuts are heavy hex nuts designed for use in high-pressure and high-temperature applications, typically in conjunction with A193 B7 bolts. These nuts are commonly used in industrial settings, especially in oil and gas, petrochemical, and power generation industries. The “A194” denotes the specification for high-strength industrial nuts, and “2HM” specifically refers to the heavy hex pattern and material grade. These nuts are often heat-treated to provide the necessary strength and durability for demanding environments.

Our advanced cold heading and hot forging processes enable us to produce a comprehensive size range, spanning from 1/4″ to 4″.

Crafted from medium carbon steel C45, control A194 2HM nuts hardness range of 159-237. We meticulously control the tempering process, ensuring temperatures exceed 1150 ℉ to achieve optimal mechanical properties.

To enhance performance, we offer various surface treatments, including black oxide for a refined appearance, galvanization for corrosion resistance, hot-dip galvanization for extended durability, and zinc flake coatings for prolonged protection.

At Ningbo Teng Qi Fasteners, our commitment to precision, quality, and customer satisfaction is embedded in every A194 Grade 2HM heavy hex nut we produce. With 20 years of industry experience, we stand as a reliable partner for your fastener needs.

A194 2HM Heavy Hex Nut


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 2HM 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 2HM Heavy Hex Nuts
StandardASTM A194
Materials:C45 STEEL
Proof Load Stress:150KSI
Marking:2HM+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 2HM Heavy Hex Nuts:

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

Application of A194 2HM Heavy Hex Nuts:

A194 2HM nuts are commonly used in heavy-duty applications where robust fastening is crucial. Here’s a simple introduction to their application:

A194 2HM nuts, known for their durability and strength, are extensively utilized in heavy-duty applications. Whether in construction, machinery, or infrastructure projects, these nuts play a critical role in securely fastening components together. Their medium carbon steel construction (C45) and controlled tempering process result in a hardness range of 159-237, making them ideal for environments where toughness and resilience are paramount. From large-scale structures to machinery assembly, A194 2HM nuts contribute to reliable and steadfast connections in various industries.

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.2HM 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.2HM:

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.