Cold heading Service

Heavy Hex Bolts Manufacturer In China

Ningbo Teng Qi Fasteners Co., Ltd is a leading heavy hex bolts manufacturer in China. A heavy hex bolt is a type of bolt that has a larger head size compared to standard hex bolts. It’s designed to provide a greater bearing surface, making it suitable for applications that require higher load-bearing capabilities. The head of a heavy hex bolt is typically thicker and larger in diameter, which distributes the load over a wider area, reducing the risk of damage to the material being fastened. These bolts are commonly used in construction, industrial, and structural applications where strong and secure connections are essential.

A325 heavy hex bolt

Specification of Heavy Hex Bolts:

Product nameHeavy Hex bolts
DiameterMetric: M6-M100
Imperial:1/4" to 4"
LengthMetric: Up to 800mm
Imperial: Up to 30"
Head TypeHeavy Hex Head
A2-70 A2-80 A4-70 A4-80
GradeSAE J429 GR.2/5/8
A325 A490
MaterialSteel/Stainless steel/Brass/Aluminum
Manufacturing Processwire drawing, cold heading/hot forging, thread rolling, heat treatment, surface treatment
Surface treatmentBlack Oxide Coating/Zinc Plating (Electroplating)/Hot-Dip Galvanizing/Mechanical Galvanizing/Dacromet Coating/Painting or Powder Coating
Application IndustryConstruction/Agricultural Machinery/Industrial Structures/Equipment and Machinery/Infrastructure

Compatible nuts/washers for heavy hex bolt:  

Heavy Hex Nuts: These nuts are specifically designed to match the larger head size of heavy hex bolts. The larger bearing surface of heavy hex nuts complements the larger head of the bolt, providing improved load distribution and stability.

Large washers: these washers are used in conjunction with heavy hex bolts. They have a larger outer diameter compared to standard flat washers, which enhances load distribution and helps prevent material damage.

FAQ about heavy hex bolts manufacturer:

1.Can heavy hex bolt be used in applications with high vibration or dynamic loads??

Yes, heavy hex bolt can be used in such applications, but it’s essential to use locking mechanisms like lock washers, nylon-insert lock nuts, or thread-locking compounds to prevent loosening due to vibration.

2.What materials are heavy hex bolt typically made from?

Heavy hex bolts can be manufactured from various materials, including steel, stainless steel, brass, and other alloys. The choice of material depends on the specific application and environmental factors.

3.Are heavy hex nuts and washers required with heavy hex bolt?

Yes, heavy hex bolts typically require matching heavy hex nuts and washers to ensure proper fastening and load distribution.

4.How can I ensure the proper installation of heavy hex bolt?

Proper installation involves using the correct torque, following manufacturer specifications, and adhering to industry standards. It’s essential to use calibrated tools and follow best practices for safety.

5. Do you have a minimum order quantity requirement?

Yes, the MOQ we usually produce is about one ton. But we have most sizes in stock, so for inventory items, even 10 units we can supply.

6.What’s the price of a325 heavy hex bolt?

The price is made up of materials, processing, packaging and labor costs. We are focused on the production of fasteners factory. Committed to making our customers profitable. The wholesale price of a325 heavy hex bolts is 1300-2000usd/ton. The material price of steel will fluctuate frequently, and the price is different for different surface treatment/quantity, so please send the inquiry to our email for the specific price. Emai:

Quality control in production process of hex bolt:

Ningbo Teng Qi Fasteners is more than just a heavy hex bolt supplier and manufacturer. We are architects of stability, builders of relationships, and champions of your success. When you choose Ningbo Teng Qi Fasteners, you choose unwavering quality, exceptional service, and a partner who understands that every bolt holds a piece of your vision.

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.