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Specifications
Material: Carbon steel, alloy steel, or stainless steel
Standards: SAE J429 Grade 5 & Grade 8 compliance
Sizes Available: Ranges from M6 to M24 (custom sizes available)
Finish Options: Zinc-plated, hot-dip galvanized, plain finish
Applications: Architectural steel structures, bridges, oil pipelines, machinery, furniture, vessels, and railways
Features
High tensile strength for demanding applications
Corrosion-resistant finishes for extended lifespan
Precise thread geometry for secure fastening
Compatible with a variety of nuts and washers
Our bolts are produced using a systematic process to ensure strength, durability, and accuracy:
Raw Material Selection
We start with high-grade materials, including carbon and alloy steel, to meet SAE J429 specifications.
Forging and Heat Treatment
Bolts are hot forged for structural integrity and then heat-treated to achieve the required tensile strength.
Threading and Surface Finishing
Threads are machined with precision to match international standards, followed by surface treatments for corrosion resistance.
Quality Assurance
Every bolt undergoes rigorous testing, including tensile strength tests, hardness checks, and dimensional accuracy inspections.
Feature | Grade 5 | Grade 8 |
Tensile Strength | Up to 120,000 PSI | Up to 150,000 PSI |
Application | Medium-strength general use | High-stress industrial use |
Marking | 3 radial lines on the head | 6 radial lines on the head |
Grade 5 bolts are ideal for moderate-load applications, while Grade 8 bolts are better suited for heavy-duty or high-load scenarios.
Quality Assurance
We adhere to ISO9001:2000 standards, ensuring that every bolt meets your expectations. Any issue is resolved promptly using an 8D reporting process.
Customization Services
Need non-standard bolts? We offer OEM/ODM solutions, tailoring products to your specific needs.
Global Export Expertise
Serving clients in North America, Europe, Australia, and more, we understand the demands of international markets and deliver on time.
Competitive Pricing
As a manufacturer, we provide factory-direct prices without compromising on quality.
DIN 127 refers to a specific standard for spring washers, commonly used alongside hex head bolts. These washers enhance the fastening system by:
Preventing loosening due to vibrations
Distributing load evenly to protect the material
Increasing the overall lifespan of the assembly
At Topbolt, we offer a variety of washers, including DIN 127 models, to complement our bolts and ensure a secure fastening solution.
What is the difference between hex head and other bolt types?
Hex head bolts feature a six-sided head for enhanced grip and torque. They’re ideal for structural applications where secure fastening is critical.
Can I order custom bolt sizes?
Yes, we offer custom sizes and specifications to meet your unique requirements.
What industries use SAE J429 G5 & G8 bolts?
These bolts are widely used in construction, machinery, oil pipelines, and other heavy-duty applications requiring high tensile strength.
How do you ensure product quality?
We follow ISO9001:2000 standards and conduct thorough inspections at every production stage.
Do you provide samples?
Yes, samples are available upon request. Contact us to discuss your needs.
Contact Topbolt Metalworks Today!
Ready to source high-quality SAE J429 G5 & G8 Hex Head Bolts?
Reach out to us for quotes, product details, or any questions:
Sales Office: ROOM1-3, No.34 Building 5, Eastern Business Centre, Jiangdong District, Ningbo, China
Factory Location: Yuyan, Xiepu Chemical Industrial Zone, Zhenhai District, Ningbo, China
Tel: +86-574-86595122
Fax: +86-574-86657066
Email: sales2@topboltmfg.com
Discover the Topbolt difference. Let’s build a strong partnership today!
Specifications
Material: Carbon steel, alloy steel, or stainless steel
Standards: SAE J429 Grade 5 & Grade 8 compliance
Sizes Available: Ranges from M6 to M24 (custom sizes available)
Finish Options: Zinc-plated, hot-dip galvanized, plain finish
Applications: Architectural steel structures, bridges, oil pipelines, machinery, furniture, vessels, and railways
Features
High tensile strength for demanding applications
Corrosion-resistant finishes for extended lifespan
Precise thread geometry for secure fastening
Compatible with a variety of nuts and washers
Our bolts are produced using a systematic process to ensure strength, durability, and accuracy:
Raw Material Selection
We start with high-grade materials, including carbon and alloy steel, to meet SAE J429 specifications.
Forging and Heat Treatment
Bolts are hot forged for structural integrity and then heat-treated to achieve the required tensile strength.
Threading and Surface Finishing
Threads are machined with precision to match international standards, followed by surface treatments for corrosion resistance.
Quality Assurance
Every bolt undergoes rigorous testing, including tensile strength tests, hardness checks, and dimensional accuracy inspections.
Feature | Grade 5 | Grade 8 |
Tensile Strength | Up to 120,000 PSI | Up to 150,000 PSI |
Application | Medium-strength general use | High-stress industrial use |
Marking | 3 radial lines on the head | 6 radial lines on the head |
Grade 5 bolts are ideal for moderate-load applications, while Grade 8 bolts are better suited for heavy-duty or high-load scenarios.
Quality Assurance
We adhere to ISO9001:2000 standards, ensuring that every bolt meets your expectations. Any issue is resolved promptly using an 8D reporting process.
Customization Services
Need non-standard bolts? We offer OEM/ODM solutions, tailoring products to your specific needs.
Global Export Expertise
Serving clients in North America, Europe, Australia, and more, we understand the demands of international markets and deliver on time.
Competitive Pricing
As a manufacturer, we provide factory-direct prices without compromising on quality.
DIN 127 refers to a specific standard for spring washers, commonly used alongside hex head bolts. These washers enhance the fastening system by:
Preventing loosening due to vibrations
Distributing load evenly to protect the material
Increasing the overall lifespan of the assembly
At Topbolt, we offer a variety of washers, including DIN 127 models, to complement our bolts and ensure a secure fastening solution.
What is the difference between hex head and other bolt types?
Hex head bolts feature a six-sided head for enhanced grip and torque. They’re ideal for structural applications where secure fastening is critical.
Can I order custom bolt sizes?
Yes, we offer custom sizes and specifications to meet your unique requirements.
What industries use SAE J429 G5 & G8 bolts?
These bolts are widely used in construction, machinery, oil pipelines, and other heavy-duty applications requiring high tensile strength.
How do you ensure product quality?
We follow ISO9001:2000 standards and conduct thorough inspections at every production stage.
Do you provide samples?
Yes, samples are available upon request. Contact us to discuss your needs.
Contact Topbolt Metalworks Today!
Ready to source high-quality SAE J429 G5 & G8 Hex Head Bolts?
Reach out to us for quotes, product details, or any questions:
Sales Office: ROOM1-3, No.34 Building 5, Eastern Business Centre, Jiangdong District, Ningbo, China
Factory Location: Yuyan, Xiepu Chemical Industrial Zone, Zhenhai District, Ningbo, China
Tel: +86-574-86595122
Fax: +86-574-86657066
Email: sales2@topboltmfg.com
Discover the Topbolt difference. Let’s build a strong partnership today!