Standard：DIN931,DIN933、ANSI、BSW
Size：M3-100、1/4"-4”、 1/4"-4”
Grade: 4.8, 5.8, 88, 10.9,12.9、2,5,8
Surface：WZP, BZP, YZP, Black, HDG, Dacromet, Plain
Product Description
This high-strength hex bolt is a fundamental fastening component widely used in mechanical, construction, automotive, and industrial engineering applications. Designed and manufactured in accordance with internationally recognized standards such as DIN931, DIN933, ANSI, and BSW, it ensures excellent compatibility, reliable performance, and consistent quality across global markets. With its precise engineering, multiple strength grades, and diverse surface treatment options, this product is suitable for a wide range of fastening requirements from general assembly to heavy-duty structural applications.
International Standards and Global Compatibility
The hex bolt is produced strictly following DIN931 (partially threaded hex bolt), DIN933 (fully threaded hex bolt), ANSI standards, and BSW specifications, ensuring dimensional accuracy and interchangeability with corresponding nuts and fastening systems worldwide. These standards guarantee uniform thread design, head dimensions, and mechanical properties, making installation and replacement highly convenient in international projects.
Thanks to its standardized production, this bolt is widely accepted in global industries such as construction, machinery manufacturing, automotive assembly, shipbuilding, and infrastructure development. Whether used in metric or imperial systems, it provides stable and reliable fastening performance.
Wide Size Range for Multiple Applications
To meet diverse engineering needs, the product is available in an extensive size range. Metric sizes cover M3 to M100, while imperial sizes range from 1/4" to 4". This broad selection allows the bolt to be used in both precision equipment and large-scale structural systems.
Smaller sizes such as M3–M10 are commonly used in electronics, household appliances, and light machinery. Medium sizes are widely applied in automotive components and industrial equipment. Larger sizes up to M100 and 4 inches are suitable for heavy construction, bridges, steel structures, mining machinery, and other high-load environments.
This flexibility in sizing ensures that customers can find the exact specification required for their specific application, improving efficiency and reducing sourcing complexity.
Multiple Strength Grades for Engineering Requirements
The hex bolt is available in several mechanical strength grades, including Grade 4.8, 5.8, 8.8, 10.9, 12.9 (metric) and Grade 2, 5, 8 (imperial). Each grade represents a different level of tensile strength and load-bearing capacity, allowing engineers to select the most appropriate option based on structural demands.
Lower grades such as 4.8 and 2 are suitable for general-purpose fastening where moderate strength is sufficient. Medium grades like 5.8 and 5 are commonly used in standard machinery and equipment. High-strength grades such as 8.8, 10.9, 12.9, and Grade 8 are designed for critical applications requiring superior tensile strength, vibration resistance, and long-term durability.
This graded system ensures safe and efficient performance in both light-duty and heavy-duty environments.
Surface Treatment Options for Enhanced Durability
To improve corrosion resistance and extend service life, the hex bolt is available with multiple surface finishes, including WZP (white zinc plated), BZP (blue zinc plated), YZP (yellow zinc plated), black oxide, HDG (hot-dip galvanized), Dacromet coating, and plain finish.
Each coating provides different levels of protection and appearance. Zinc plating options are commonly used for indoor and general-purpose applications due to their cost-effectiveness and moderate corrosion resistance. Black oxide provides a smooth surface finish and is suitable for controlled environments. Hot-dip galvanizing (HDG) offers strong protection against rust and is ideal for outdoor and marine applications. Dacromet coating delivers advanced corrosion resistance, making it suitable for harsh environments such as chemical plants, offshore structures, and heavy industry. The plain finish is used when additional processing or coating will be applied later.
Performance and Application Advantages
This hex bolt is engineered with high-precision threads and strict dimensional control to ensure smooth installation and reliable fastening performance. It provides strong clamping force and excellent resistance to vibration, ensuring long-term stability of assembled structures.
It is widely used across multiple industries, including construction engineering, automotive manufacturing, machinery equipment, electrical installations, bridges, railways, and industrial assembly systems. Its versatility makes it one of the most essential fastening components in modern engineering.
In addition, the product offers excellent torque performance and mechanical stability, reducing the risk of loosening under dynamic loads or harsh operating conditions. Its durability minimizes maintenance requirements and extends the service life of the entire assembly system.
Overall, this hex bolt combines international standard compliance, a wide size range, multiple strength grades, and diverse surface treatments into a single high-performance fastening solution. Its reliability, durability, and adaptability make it suitable for a broad spectrum of industrial and structural applications. Whether used in light machinery or heavy engineering projects, it delivers consistent quality and dependable fastening performance, making it an essential component in modern manufacturing and construction industries.
Product Features
- International Standard Compliance
Manufactured according to DIN931, DIN933, ANSI, and BSWstandards, ensuring global compatibility, consistent quality, and reliable interchangeability with standard fastening systems. - Wide Size Coverage
Available in metric sizes from M3 to M100and imperial sizes from 1/4" to 4", meeting the requirements of light-duty, medium-duty, and heavy-duty applications. - Multiple Strength Grades
Offered in Grade 4.8, 5.8, 8.8, 10.9, 12.9 (metric)and Grade 2, 5, 8 (imperial), allowing flexible selection based on different load-bearing and safety requirements. - High-Precision Threading
Advanced manufacturing ensures accurate thread profiles, smooth installation, and excellent compatibility with nuts and other fastening components. - Strong Mechanical Performance
Designed to provide high tensile strength and stable clamping force, ensuring secure fastening even under vibration and dynamic loads. - Two Structural Types Available
Supports both DIN931 (partially threaded)and DIN933 (fully threaded) designs, offering flexibility for different engineering applications. - Multiple Surface Treatments
Available finishes include WZP, BZP, YZP, black oxide, HDG (hot-dip galvanized), Dacromet, and plain, providing various levels of corrosion resistance and appearance options. - Excellent Corrosion Resistance
HDG and Dacromet coatings deliver superior protection against rust and harsh environmental conditions, extending service life in outdoor and industrial use. - Wide Industrial Applications
Suitable for construction, automotive, machinery, infrastructure, shipbuilding, and general engineering assembly. - Durable and Long-Lasting Performance
High-quality materials and strict production control ensure long service life and reduced maintenance costs. - Cost-Effective Fastening Solution
Combines strength, durability, and versatility, helping reduce replacement frequency and overall project costs.
