High Strength Fasteners

Available Grades

• Grade 8.8 High-Strength Fasteners: Manufactured from medium carbon steel with heat treatment, offering excellent comprehensive mechanical properties. Widely used in general engineering structures and machinery manufacturing, it is one of the most commonly used high-strength grades.
• Grade 10.9 Ultra-High Strength Fasteners: Made from alloy steel through quenching and tempering, providing extremely high tensile and yield strength. Ideal for critical structural connections requiring maximum reliability, such as large building steel structures, bridges, and heavy machinery.
• Custom & Standard Solutions: We also provide standard grades like 4.8, 5.8, 6.8, and can customize special performance grades according to customer requirements, meeting diverse market needs.

Product Features

1. International Standard Manufacturing: Strictly produced according to GB, ISO, DIN, ANSI(IFI), BS, JIS and other international standards, ensuring product universality andy inspected by advanced spectral analysis equipment to guarantee product quality from the source.
2. Advanced Production Processes: Equipped with multi-station cold headers, high-precision thread rolling machines, and mesh belt quenching furnaces to ensure dimensional accuracy and mechanical properties.
3. Comprehensive Quality Control: A full-process quality monitoring system from raw material inspection to finished product delivery, with precision testing equipment such as universal testing machines, hardness testers, and torque testers.
4. Strong Customization Capability: Professional R&D team and production capacity to customize various non-standard fasteners according to customer drawings or samples.
5. Corrosion-Resistant Surface Treatments: Offering multiple surface treatment options including black oxide, hot-dip galvanizing, and dacromet to effectively enhance corrosion resistance for different working environments.

Applications

• Construction Steel Structures: Used for beam-column connections in large stadiums, high-rise buildings, and industrial plants, ensuring structural stability and safety.
• Engineering Machinery: For connecting key structural components of heavy machinery such as excavators, cranes, and loaders, withstanding heavy loads and vibrations.
• Railway Bridges: Used for structural connections and bearing installations in railway bridges, requiring extremely high reliability and fatigue resistance.
• Petrochemical Industry: For equipment like oil drilling platforms, pipeline systems, and storage tanks, needing to meet both high strength and corrosion resistance requirements.
• Shipbuilding Heavy Industry: For installing hull structures, deck machinery, and power systems, adapting to harsh marine environments.
• Transportation & Aerospace: For high-end equipment like aircraft manufacturing and rail transit vehicles, with extremely strict requirements for precision and reliability.

Product Advantages

• Quality Assurance: Certified with ISO9001, ISO14001, and ISO45001 management systems, ensuring every product meets strict quality standards.
• Production Strength: With an annual production capacity of 20,000 tons, advanced production equipment, and complete production lines, we can meet the timely delivery of large-scale orders.
• Technological Leadership: As a national high-tech enterprise with multiple patented technologies and complete testing equipment, our technical strength is 雄厚.
• Customer Recognition: Awarded the “Zhejiang Made” certification and recognized as an excellent partner by China Railway, our products have long been supporting key domestic and international projects and large enterprises.
• Service Value: Providing customers with one-stop solutions from product selection and technical consultation to customized production, ensuring customers receive the most suitable fastening system.

Technical Data Table

(Typical values for Grade 10.9 high-strength bolts, reference standard GB/T 3098.1)

Property	Unit	Typical Value
Tensile Strength	MPa	≥ 1040
Yield Strength	MPa	≥ 940
Elongation	%	≥ 9
Reduction of Area	%	≥ 48
Hardness	HRC	32 – 39
Proof Load	MPa	830

Note: Specific values may vary slightly depending on product specifications and standard versions. For detailed data, please refer to the product specification sheet or contact us.

Why Choose Us

• Nearly 30 Years of Professional Experience: Since our establishment in 1992, we have focused on the R&D and production of high strength fasteners, accumulating rich industry experience and technical know-how.
• Comprehensive Certifications: Holding multiple authoritative domestic and international certifications such as ISO9001, ISO14001, ISO45001, and “Zhejiang Made” certification, our quality is trustworthy.
• Advanced Production & Testing Equipment: Importing internationally advanced production equipment and precision testing instruments to ensure product accuracy and performance meet international standards.
• Flexible Customization Services: Our strong engineering team can quickly respond to customer needs and provide customized solutions from design to production.
• Perfect After-Sales Service: Providing professional technical support and timely after-sales service to ensure customers have no worries during use.

Packaging & Shipping

• Packaging Methods:

• Inner Packaging: Products are individually wrapped with anti-rust paper or plastic film to prevent mutual friction and rust.
• Outer Packaging: Depending on product specifications and quantity, sturdy cartons, wooden cases, or pallets are used for packaging to ensure transportation safety.
• Labeling: Each packaging unit is clearly labeled with product name, specifications, quantity, batch number, and quality inspection mark.
  • Shipping Services:
• Geographical Advantage: Located in Ningbo, only 40 kilometers from Beilun Port, we enjoy convenient transportation and a developed logistics network.
• Transportation Methods: Multiple transportation methods such as sea, land, and air freight can be provided according to customer needs.
• Export Capability: Holding self-operated import and export rights, we are familiar with international trade processes and can efficiently handle export customs clearance and logistics matters.
  • Q1: What certifications can your products provide?
• A: Our products are certified with ISO9001, ISO14001, ISO45001 management systems, and have obtained the “Zhejiang Made” certification. They also meet the requirements of EU CE certification.
  • Q2: Do you accept non-standard product customization?
• A: Yes, we have a professional R&D team and flexible production capacity, and can customize various non-standard high strength fasteners according to the drawings, samples, or specific requirements provided by customers.
  • Q3: What is the delivery time for the products?
• A: The delivery time for standard products is usually 30-45 days, depending on the order quantity and product specifications. The delivery time for non-standard products needs to be evaluated according to specific requirements.
  • Q4: How do you ensure product quality?
• A: We have established a perfect quality assurance system, with strict quality monitoring at every step from raw material procurement, production process control to finished product inspection. We have advanced testing equipment to ensure every batch of products meets the standard requirements.
  • Q5: What are the main application fields of your products?
• A: Our products are widely used in construction steel structures, engineering machinery, railway bridges, petrochemicals, shipbuilding heavy industry, transportation and aerospace and other fields, providing reliable fastening solutions for various key projects and equipment.
  • Q6: What surface treatment options are available for the products?

A: We offer multiple surface treatment methods, including black oxide, hot-dip galvanizing (HDG), electro-galvanizing (BZP), dacromet (DACROMET), etc., to