| Customization: | Available |
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| Material: | Steel (Carbon Steel, Alloy Steel) |
| Type: | Hexagon Head |
| Shipping Cost: | Contact the supplier about freight and estimated delivery time. |
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Our hex head bolt is a precision-engineered fastener used in mechanical, structural, and industrial assemblies. Manufactured from durable carbon steel or alloy steel, it features a hexagonal head design with external threading for efficient torque application and secure fastening. This bolt is surface treated with zinc plating to enhance corrosion resistance and ensure long-lasting performance across various construction and machinery applications. Compatible with multiple standards such as DIN 931 and ASTM A307.
| Attribute | Details |
|---|---|
| Head Type | Hexagonal with Washer Face |
| Thread Type | UNC / Metric / Custom |
| Thread Standard | DIN 931, ASTM A307 |
| Material | Carbon Steel / Alloy Steel |
| Surface Finish | Zinc-Plated / Plain / Bright / Black Oxide |
| Grades Available | 4.8, 6.8, 8.8, 10.9, 12.9 |
| Tensile Strength | Based on Grade (e.g., 8.8 = 800 MPa) |
| Connection Type | Male Threaded |
| Groove | None |
| Temperature Range | -50°C to 300°C |
| OEM/ODM | Acceptable |
| Quality Control | 100% Inspected; MTC Provided |
| Condition | Brand New |
| Certification | ISO9001, SGS, TAF |
Construction and Infrastructure Projects
Industrial Machinery and Equipment
Automotive Assembly and Repairs
Structural Frameworks
Power Plants and Mechanical Installations
Chemical Plants and Processing Equipment
Strong mechanical fastening under dynamic and static loads
Corrosion-resistant surface treatment with zinc coating
Available in multiple international standards
High-grade tensile strength options for heavy-duty uses
Consistent threading and dimensional accuracy
Custom sizes and finishes available upon request
Suitable for large-scale production and OEM supply
| Diameter (mm) | Length Range (mm) | Width Across Flats (mm) | Thread Pitch | Customizable |
|---|---|---|---|---|
| M5 | 10 - 60 | 8 | 0.8 | Yes |
| M6 | 12 - 70 | 10 | 1.0 | Yes |
| M8 | 16 - 100 | 13 | 1.25 | Yes |
| M10 | 20 - 120 | 17 | 1.5 | Yes |
| M12 | 25 - 150 | 19 | 1.75 | Yes |
| M16 | 30 - 200 | 24 | 2.0 | Yes |
| M20 | 35 - 250 | 30 | 2.5 | Yes |
| M24 | 40 - 300 | 36 | 3.0 | Yes |
| Other sizes | On Request | As Required | As Required | Yes |
ISO 9001 Certified: Strict compliance with international quality management standards for consistent quality and traceable processes.
SGS Verified: Independent inspection and verification for material and product conformity.
Laboratory Testing Accreditation: Products undergo both in-house lab testing and, if required, third-party lab testing to ensure compliance with customer-specific technical standards.
CE & RoHS Compliance: Meets EU safety and environmental requirements.
100% Leak & Pressure Tested: Each unit is pressure tested before packing to ensure no leaks and safe operation.
HONGSTEEL offers competitive pricing, negotiable quotes, and full support for samples or drawings. We provide OEM & ODM solutions to fit your unique project requirements. Let's build efficient pneumatic systems together!


Jiaxing Hongsteel Trading Co., Ltd., in partnership with Ningbo Hongsteel Machinery Co., Ltd., proudly stands as a beacon of excellence in advanced manufacturing and international trade under the prestigious name "Hongsteel". With an illustrious record spanning over 16 years, we have carved a niche in the global market by consistently delivering precision-engineered components and offering unbeatable service worldwide.
As a leading force in both manufacturing and trading, we at Hongsteel specialize in crafting non-standard manufactured parts, fasteners, construction machinery components, electric tool parts, and automotive components, among others. Our commitment to excellence extends to providing fully customized solutions that cater to each client's specific needs, ensuring their utmost satisfaction.
Empowered by a team of highly skilled technicians and cutting-edge production equipment, we at Hongsteel guarantee superior efficiency, rigorous quality control, and unwavering product performance at every phase of production. Our state-of-the-art facilities boast certifications like ISO9001, ISO 17025, and SGS, alongside laboratory testing accreditations, affirming our adherence to international quality standards.
At Hongsteel, our ethos revolves around the core values of "quality first, service foremost, and continuous improvement and innovation" to meet and exceed customer expectations. Our relentless pursuit of excellence is encapsulated in our quality objectives: "zero defects, zero complaints." We warmly invite your inquiries and eagerly anticipate forging long-lasting, prosperous partnerships with clients worldwide.

