As a leading hex bolt manufacturer in China, Panfa Fastener has become a trusted fastener supplier for domestic and international customers through years of production experience and technological expertise. We strictly adhere to international standards and Chinese national standards, providing high-quality, high-performance hex bolts widely used in industries such as construction, machinery, automotive, and power.

1. Chinese Hex Bolt Manufacturing Standards & Specifications

As a professional hex bolt manufacturer in China, Panfa Fastener strictly complies with the following national and international standards:

1.1 Chinese National Standards (GB)

• GB/T 5782-2023: The primary standard for our regular hex head bolts, specifying dimensions, tolerances, and technical requirements

• GB/T 5783: Full-thread hex head bolt standard, suitable for special applications requiring full-length threading

• GB/T 3098.1-2010: Fastener mechanical properties standard, ensuring our bolts meet required strength grades

• GB/T 6170-2023: Hex nut matching standard, guaranteeing perfect compatibility between bolts and nuts

1.2 International Standards

• ISO 4014: Hex head bolt standard from the International Organization for Standardization (ISO), ensuring compliance with global market demands

• DIN 931: Hex bolt specification from the German Institute for Standardization (DIN), meeting the high standards of European customers

• ASTM/ASME Standards: For North American market requirements, we provide hex bolts that conform to U.S. standards

2. Core Advantages of Panfa Fastener

2.1 Advanced Production Equipment & Processes

We possess fully automated production lines and precision testing equipment, utilizing advanced processes such as cold heading, heat treatment, and surface treatment to ensure every hex bolt meets the highest quality standards. Our products undergo rigorous visual inspection, dimensional measurement, and mechanical performance testing, including critical indicators such as tensile strength, hardness, and torque.

2.2 Comprehensive Product Range

Panfa Fastener offers a variety of hex bolt products:

• Standard hex head bolts (GB/T 5782)

• Full-thread hex bolts (GB/T 5783)

• High-strength structural large hex head bolts (GB/T 18230.2)

• Anti-corrosion hex full-thread bolts (T/CASME 632-2023)

• Hex head slotted bolts (GB/T 29.1-2013)

2.3 Diverse Material Options

We provide hex bolts in carbon steel, alloy steel, stainless steel (A2/A4), and other materials to meet different environmental and application needs:

• Carbon steel bolts: High-strength grades such as 8.8 and 10.9

• Stainless steel bolts: Corrosion-resistant grades such as A2-70 and A4-70

• Special alloy bolts: Suitable for extreme environments like high temperature and high pressure

2.4 Professional Surface Treatment Technologies

Based on customer requirements, we offer various surface treatment solutions:

• Electro-galvanized (white zinc, yellow zinc, blue-white zinc)

• Hot-dip galvanized

• Dacromet coating

• Non-electrolytic zinc flake coating (compliant with GB/T 5267.2)

• Black oxide treatment

3. Strict Quality Control System

Panfa Fastener has established a comprehensive quality management system, with strict controls at every stage from raw material procurement to finished product delivery:

1. Raw Material Inspection: Chemical composition analysis and mechanical performance testing for each batch of steel

2. Production Process Control: Real-time monitoring of key processes such as cold heading, threading, and heat treatment

3. Finished Product Inspection: 100% visual inspection, with sampling for dimensional measurement and mechanical performance testing

4. Packaging & Shipping: Anti-rust packaging to ensure products remain undamaged during transportation

Our testing equipment includes spectrometers, hardness testers, tensile testing machines, and salt spray test chambers, ensuring compliance with GB/T 90.1 fastener acceptance inspection standards.

4. Applications

Panfa Fastener's hex bolts are widely used in:

• Construction: Steel structure connections, bridge construction, prefabricated component installation

• Machinery: Industrial equipment assembly, production line equipment fastening

• Automotive Manufacturing: Engine component fixation, chassis connections

• Power & Energy: Transmission tower frames, transformer installation

• Rail Transit: Track fixation, vehicle manufacturing

• Home Appliances & Electronics: Electrical enclosure fastening, internal structure connections

5. Why Choose Panfa Fastener?

1. Professional Manufacturing Experience: Years of expertise in hex bolt production with mature and reliable technology

2. Strict Quality Control: Full-process quality monitoring from raw materials to finished products

3. Fast Delivery Capability: Sufficient inventory and efficient production lines ensure timely delivery

4. Customization Services: Special specifications, materials, and surface treatments available upon request

5. Competitive Pricing: Economies of scale provide cost advantages and high cost-performance products

6. Comprehensive After-Sales Service: Professional technical support and prompt response

6. Contact Us

As a leading hex bolt manufacturer in China, Panfa Fastener looks forward to establishing long-term partnerships with global customers. Whether you need standard products or custom solutions, we can provide satisfactory results.

Contact Information:

• Phone: +86-181-32216205

• Email: admin@panfafastener.com

• Website: www.panfafastener.com

• Choose Panfa Fastener for quality and reliability! We look forward to providing you with premium hex bolt products and professional service.