Carbon Steel Zinc Plated Grade 5 Hexagon Head Bolt
Introduction: Grade 5 Hexagon Head Bolt
The Grade 5 Hexagon Head Bolt is a high-performance fastener engineered for demanding applications that require strength, durability, and resistance to corrosion. Constructed from medium-carbon steel and heat-treated for enhanced strength, this bolt complies with SAE J429 standards, ensuring quality performance in structural and mechanical applications. With a zinc-plated finish, it provides additional protection against rust and environmental degradation. The hexagonal head design allows for easy tightening with standard tools, making it a preferred choice across various industries.
Specifications Table
| Parameter | Specification |
|---|---|
| Product Name | Grade 5 Hexagon Head Bolt |
| Material | Carbon Steel |
| Surface Finish | Zinc Plated |
| Standard | SAE J429 Grade 5 |
| Head Type | Hexagon |
| Thread Type | UNC/UNF Fully or Partially Threaded |
| Size Range | 1/4″ to 1-1/4″ |
| Length | 1/2″ to 6″ |
| Tensile Strength | 120,000 psi (min) |
| Yield Strength | 92,000 psi (min) |
Technical Data Table
| Mechanical Property | Value |
|---|---|
| Hardness (Rockwell) | C25-C34 |
| Proof Load | 85,000 psi (min) |
| Elongation | 15% min |
| Reduction of Area | 35% min |
| Working Temperature Range | -50°C to +300°C |
Material & Manufacturing Process
Grade 5 Hexagon Head Bolts are manufactured from medium carbon steel which is subsequently quenched and tempered to reach the required strength levels. The surface is zinc plated via electroplating or hot-dip galvanization — a process that not only boosts resistance to oxidation and rust but also gives the bolt a bright, professional appearance.
The production flow includes:
- Raw Material Selection (Carbon steel bars)
- Cold/Hot Forging for Head Formation
- Thread Rolling (Precision-machined)
- Heat Treatment (Quenching and Tempering)
- Surface Plating (Zinc)
- Quality Inspection and Packaging
Common Applications Across Industries
Hexagon head bolts Grade 5 are ideal for use in a variety of industrial and commercial sectors due to their strength and reliability:
- Automotive Assembly (engine parts, chassis)
- Industrial Machinery
- Agricultural Equipment
- Construction (steel structures, bridge work)
- Marine & Offshore Hardware
- Rail, Truck & Heavy Equipment
Competitive Advantages of Grade 5 Hexagon Head Bolts
Grade 5 Hexagon Head Bolts stand out in the market for several compelling reasons:
- ✔️ Premium Carbon Steel: Offers excellent tensile and yield strength.
- ✔️ Advanced Zinc Plating: Prolongs lifespan through superior corrosion resistance.
- ✔️ Accurate Tolerances: Ensures precise fit and torque application.
- ✔️ Thread Consistency: Achieved through state-of-the-art rolling technology.
- ✔️ Versatility in Applications: Suitable for both high-load and vibration-prone environments.
- ✔️ Fully Customizable: We offer OEM/ODM services to adapt dimensions, threads, lengths, and coatings to your needs.
- ✔️ Ample Inventory & Quick Dispatch: Ready-stocked bolts can be shipped promptly.
- ✔️ Comprehensive After-Sales & Tech Support: Support that extends beyond the sale.
Quality Control & Testing Standards at Flybear Fastener
At Flybear Fastener, quality assurance is ingrained in every production stage. All bolts are subject to a detailed inspection regime covering raw material composition, dimensional accuracy, tensile strength testing, zinc coating thickness, and salt-spray corrosion tests. We maintain ISO 9001:2015 compliance and continuously invest in modern quality control equipment to deliver consistent, premium results.
How to Choose and Buy Grade 5 Hex Head Bolts
When selecting the right Grade 5 bolt, consider:
- Required mechanical loads and vibration levels
- Exposure to environmental conditions (e.g., moisture, temperature)
- Thread type and length
- Bolt length and diameter
- Standard compliance requirements (SAE J429, ASTM)
For bulk purchases or specialized configurations, we provide engineering consultation and sourcing support.
Summary and Company Promotion
Grade 5 Hexagon Head Bolts provide optimal performance across multiple industries, thanks to their perfect balance of tensile strength, corrosion resistance, and manufacturing precision. Whether you’re designing machinery or constructing structural frameworks, these bolts are built to perform under pressure.
We at Flybear Fastener always uphold the principle of “quality first, customer foremost,” committed to delivering top-notch fastener products and one-stop solutions tailored to your project requirements.
Feel free to contact us to discuss your application needs, request a custom quote, or explore our full bolt and nut catalog.
Additional Content: Sustainability and Eco-Friendly Coating Methods
Our zinc plating process aims to be environmentally conscious by implementing low-emission chromates and water recycling systems. This aligns with increasing global demand for sourcing from responsible and sustainable manufacturers.
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