Cold heading Service

Hex Nut Manufacturer in China

Ningbo Teng Qi Fasteners Co., Ltd. is a leading manufacturer of high-quality hex nuts based in China. Specializing in DIN934, ISO4032, UNI5587, AS1252, A194, and A563 hex nuts, we use the premium materials such as 35CrMoA alloy steel, 42CrMoA alloy steel, 25CrMoVA alloy steel, 35# medium carbon steel, 45# medium carbon steel, SS304, SS316, and more.

Our core product offerings include American standard heavy-duty nuts, British standard nuts, Australian standard nuts, large diameter nuts, hot-dip galvanized nuts, Teflon nuts, Dacromet nuts, and phosphated black nuts. These nuts are specifically designed for use in demanding environments requiring precision, strength, and corrosion resistance, such as in the petroleum, chemical, machinery, electric power, and pressure vessel industries.

Equipped with advanced cold forging machines and red forging machines ranging from 100 tons to 400 tons, Ningbo Teng Qi Fasteners Co., Ltd. stands out for its superior manufacturing capabilities. We have earned a high reputation and strong influence among partners in the United States, Europe, the United Arab Emirates, Saudi Arabia, and Vietnam.


The specifications of hex nuts include various details that define their dimensions, materials, and performance characteristics. Here’s a summary of common specifications:

Product nameHex nuts
Thread:Metric: M6-M100
Imperial: 1/4"-4"
Class/Grade:ISO898-2: 5/8/10/12
SAE J 995: 2/5/8
ASTM A194 2H/2HM/GR.7/GR.7M
Surface treatmentBlack Oxide Coating/Zinc Plating (Electroplating)/Hot-Dip Galvanizing/Mechanical Galvanizing/Dacromet Coating/Painting or Powder Coating
Standards Compliance:DIN 934/ISO 4032/ASME B 18.2.2/ASME B 18.2.6/JIS1186/UNI 5587/AS1252
DIN934 hex nut

DIN934 Hex Nut

Ningbo Teng Qi Fastener Co., Ltd. has rich experience in producing DIN934 hex nuts. In strict accordance with the ISO9001 quality system standards, the production of product quality control, to ensure that each nut qualified factory. Focus on domestic and foreign large petrochemical enterprises, electric power, nuclear power installation, pressure vessels and other high-end engineering companies supply fastener services.

ISO4032 Hex Nut

ISO4032 Hex Nut

Ningbo Teng Qi Fastener Co., Ltd. is a leading manufacturer of ISO4032 hex nut in China. ISO4032 hex nuts are one of our most popular products, equivalent to Chinese GB6170 standard nuts. We have a complete set of fastener production equipment that can complete the forging, thread forming and heat treatment of various bolts, studs, and nuts. In order to improve product quality, the company is equipped with a full set of inspection equipment, mainly including 100T tensile testing machine, impact machine, hardness tester, magnetic particle inspection, carbon and sulfur analysis, metallographic analysis and spectrometer, etc. We have hundreds of tons of ISO4032 M6-M64 nuts in stock.

A194 Heavy Hex Nut

A194 Hex Nut

Ningbo Teng Qi Fastener Co., Ltd. is a manufacturer specialized producing A194 heavy hex nuts. A194 nuts are mainly used to assemble with A193 or A320 stud bolts to connect valve pipes. We can produce A194 2H, 2HM, GR7, GR7M nuts from 1/4”-4”. The entire process from raw materials to product packaging is inspected to achieve production controllability and traceability. Ensure that the mechanical properties and chemical elements of the nut comply with ASTM194 requirements. Based on the technical requirements of fastener experts, we strive to exceed customer expectations for each of our products and strive to build China’s number one brand.

Production process:

The production process of hex nuts involves several stages, from raw material preparation to the final product. Here’s a general overview of the production process for hex nuts:

Production Procession of Hex Nuts
1. Raw Material Selection:
- The process begins with the selection of appropriate raw materials. Common materials include carbon steel, stainless steel.
2. Wire Drawing:
- The chosen material is drawn into wire form. This process helps achieve the desired diameter for the hex nut.
3. Forming:
- Cold heading or hot forging is employed to form the basic shape of the hex nut. The wire is cut to the required length, and forming machine shapes it into the hexagonal form.
4. Thread Tapping:
- The formed hex nuts undergo thread tapping. This process creates the internal threads on the nut, ensuring precision and strength.
5. Heat Treatment:
- Heat treatment is often employed to enhance the mechanical properties of the hex nuts. This can involve processes such as quenching and tempering.
6. Surface Treatment:
- Hex nuts undergo surface treatments for corrosion resistance or improved appearance. Common treatments include zinc plating, hot-dip galvanizing, or applying protective coatings.

Quality Control:

Our quality management system has successfully obtained various certifications, including ISO/TS16949:2009 for technical specifications, ISO9001:2015 for quality systems, IATF16949:2016 for automotive quality systems, and ISO/TS 22163:2017 for International Railway Quality Standard Management. Our commitment to quality assurance involves the use of precision instruments, a skilled team, and adherence to the ISO9001 quality assurance system throughout the receiving, processing, and finished product inspection stages. Ensuring that inferior products do not reach our customers is a fundamental part of our quality commitment. We firmly believe that providing prompt and accurate feedback is essential for delivering the best service.

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.

Application of Hex Nuts:

Hex nuts serve as crucial components in a multitude of applications, providing secure fastening solutions. Some notable uses include:

Fastening Structures:Essential in construction for securing bolts and screws, contributing to the stability of buildings, bridges, and various structures.
Machinery Assembly:Hex nuts widely employed in manufacturing and machinery assembly, ensuring the integrity of mechanical components.
Automotive Construction:Integral in the assembly of automotive components, ranging from engines to chassis, contributing to the overall functionality of vehicles.
Electronics Manufacturing:Hex nuts utilized in the assembly of electronic devices and equipment, ensuring stable connections and structural integrity.
Agricultural Equipment:Hex nuts employed in assembling and maintaining agricultural machinery, playing a role in the functionality of tractors, plows, and other farming equipment.
Railway Infrastructure:Crucial for constructing and maintaining railways, securing tracks and related infrastructure components.
Oil and Gas Applications:Used in the assembly and maintenance of equipment within the oil and gas industry, supporting the extraction, processing, and transportation processes.
Renewable Energy Projects:Applied in the construction and maintenance of renewable energy infrastructure, including wind turbines and solar panel installations.
Energy and Power Generation:Hex nuts are used in energy facilities, including power plants and renewable energy installations, to secure equipment and structures.
Marine and Shipbuilding:The marine industry relies on hex nuts for fastening components in ships, boats, offshore structures, and maritime equipment.
Mining and Heavy Equipment:Hex nuts are used in mining equipment and heavy machinery, ensuring that connections remain secure in harsh operating environments.

FAQ about Hex Nut:

1.What materials are available for your hex nuts?

We offer hex nuts in various materials, including stainless steel, carbon steel, and brass. Each material has unique properties suited for different applications.

2.Do you have price advantage?

Absolutely, we take pride in offering a competitive pricing advantage for our hex nuts. Our ability to produce on a large scale provides significant benefits in terms of both raw material sourcing and production costs. This efficiency allows us to pass on the cost savings to our customers, ensuring that they not only receive high-quality hex nuts but also enjoy a favorable pricing structure. Our commitment to large-scale production is a key factor in providing you with cost-effective solutions for your fastening needs.

3.What is your lead time for order fulfillment?

Our lead times may vary based on the order quantity and product availability. Normally is 45-60 days. Orders with multiple parts/custom products will take longer.

4.Do you offer bulk or custom packaging options?

We offer flexible packaging options, including bulk packaging for larger orders and custom packaging to meet specific customer requirements.

5. What finishes do you provide for hex nuts?

Our hex nuts come in a range of finishes such as plain, zinc-plated, and hot-dip galvanized. The finish can impact the nuts’ corrosion resistance and appearance.