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| Customization: | Available |
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| Material: | Carbon Steel |
| Type: | Round Head |
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This is a high-strength, carbon steel fastener manufactured according to both DIN 603 and ASTM A307 standards. With a rounded, large diameter head and a square neck just beneath, it is specifically engineered to prevent rotation once installed. Designed for durability and enhanced load-bearing, this bolt is ideal for infrastructure and structural applications where a smooth head finish is desired for aesthetics or safety. It is commonly available with a galvanized finish for corrosion resistance and long-term reliability in industrial and construction environments.
| Standard | DIN 603 / ASTM A307 |
|---|---|
| Material | Carbon Steel |
| Grade | 4.8 / 6.8 / 8.8 / 10.9 / 12.9 |
| Head Type | Round Large Head (Domed) |
| Thread Type | ISO Metric |
| Finish | Galvanized / Plain / Black Oxide |
| Connection | Threaded |
| Temperature | -50°C to 150°C |
| Strength | Up to 1000 MPa (based on grade) |
| Surface | Metallic (Bright/Dark) |
| Quality | 100% Inspected, Mill Test Available |
| Certification | ISO9001, SGS, TAF |
| Condition | Brand New |
| Origin | Ningbo, Zhejiang, China |
Construction (infrastructure, bridges, railways)
Automotive and heavy vehicle assembly
Industrial machinery and equipment
Agricultural and outdoor structures
Furniture and wood structures requiring smooth finis
High-grade strength for critical load-bearing structures
Large head provides secure fastening and anti-pull-through performance
Square neck ensures anti-rotation during tightening
Galvanized surface enhances corrosion resistance
Fully customizable in length, width, and surface finish
Compliant with multiple international standards (DIN, ASTM)
Available for OEM/ODM orders and bulk supply
| Diameter (mm) | Length Range (mm) | Head Diameter (mm) | Thread Pitch | Customizable |
|---|---|---|---|---|
| M6 | 10 - 60 | 16 - 18 | 1.0 | Yes |
| M8 | 12 - 80 | 20 - 22 | 1.25 | Yes |
| M10 | 16 - 100 | 24 - 26 | 1.5 | Yes |
| M12 | 20 - 120 | 30 - 32 | 1.75 | Yes |
| M16 | 30 - 200 | 36 - 40 | 2.0 | Yes |
| M20 | 40 - 200 | 45 - 50 | 2.5 | 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.
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