Cold heading Service

American Standard A194 Grade 7 Heavy Hex Nuts Manufacturer In China

Ningbo Teng Qi Fasteners stands as a distinguished manufacturer with two decades of expertise, specializing in American Standard A194 Grade 7 hex nuts. Our advanced cold heading and hot forging processes enable us to produce a comprehensive size range, spanning from 1/4″ to 4″.

The key material employed in our manufacturing is alloy steel 42CrMo, known for its durability and strength. This ensures that our A194 Grade 7 hex nuts meet the highest standards in the industry.

To enhance both functionality and longevity, 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 quality, precision, and customer satisfaction is reflected in every A194 Grade 7 hex nut we produce. With 20 years of industry experience, we stand as a reliable partner for your fastener needs.

American Standard A194 GRADE 7 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 7 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 7 Heavy Hex Nuts
StandardASTM A194
Materials:42crmo equivalent to AISI 4140 Steel
Proof Load Stress:175KSI
Marking:7+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

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 Grade 7 Heavy Hex Nuts:

The A194 Grade 7 heavy hex nut is commonly paired with A193 B16 or A320 L7 stud bolts or hex bolts in various industrial applications. Here’s a simple introduction:

The A194 Grade 7 heavy hex nut is a robust fastening component frequently employed alongside A193 B16 or A320 L7 stud bolts or hex bolts. This combination finds widespread use in industries such as construction, oil and gas, power generation, and more. The nut’s durable alloy steel composition, coupled with its high tensile strength, makes it ideal for applications where resilience under extreme conditions is paramount. Whether in petrochemical facilities, power plants, or structural engineering projects, the A194 Grade 7 heavy hex nut plays a crucial role in ensuring secure and reliable fastening connections.

ASTM A194 Heavy Hex Nut Grade 7 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.