| Customization: | Available |
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| Material: | Steel (Carbon Steel, Alloy Steel) |
| Type: | Carriage Bolt Head |
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This round headed carriage bolt features a smooth, domed head with a square neck beneath the head that prevents rotation during installation. Typically made from galvanized carbon or alloy steel, this bolt provides excellent resistance to corrosion and wear. It is designed for secure fastening in wood, metal, and other materials, commonly used in furniture assembly, construction, and industrial machinery.
| Attribute | Details |
|---|---|
| Material | Carbon Steel / Alloy Steel |
| Finish | Galvanized |
| Head Style | Round Head |
| Thread Type | UNC (Unified National Coarse) |
| Length Range | 10mm - 200mm (customizable) |
| Diameter Range | M6 - M27 (customizable) |
| Tensile Strength | Grade 4.8 (450-600 MPa) |
| Working Temperature | -20°C to 100°C |
| Surface Treatment | Hot-dip or Electro Galvanized |
| Connection Type | Mechanical Fastening |
| Quality Control | 100% Inspection; Mill Test Certificate Available |
| Certification | ISO9001, SGS, TAF |
| Origin | Ningbo, Zhejiang, China |
Wooden furniture assembly for secure joints
Construction industry for timber framing and scaffolding
Industrial machinery fastening requiring vibration resistance
Agricultural equipment assembly
Outdoor structures where corrosion resistance is essential
Automotive chassis and body fastening
Corrosion Resistance: Galvanized finish protects against rust and extends bolt life in humid or outdoor environments
Anti-Rotation Square Neck: Prevents bolt spinning during tightening, simplifying installation
Versatile Sizes: Wide length and diameter options allow custom fitting for various projects
High Tensile Strength: Grade 4.8 ensures reliable fastening under moderate mechanical stress
Consistent Quality: Strict QC and certifications ensure product reliability and performance
Easy Installation: Smooth rounded head provides a clean, finished appearance without sharp edges
| Diameter (mm) | Length (mm) | Thread Pitch (mm) | Head Diameter (mm) | Head Height (mm) |
|---|---|---|---|---|
| M6 | 12-200 | 1.0 | ~10 | ~4.0 |
| M8 | 16-200 | 1.25 | ~13 | ~5.0 |
| M10 | 20-200 | 1.5 | ~16 | ~6.4 |
| M12 | 25-200 | 1.75 | ~18 | ~7.5 |
| M16 | 30-200 | 2.0 | ~24 | ~9.0 |
| M20 | 40-200 | 2.5 | ~30 | ~12.0 |
| M24 | 50-200 | 3.0 | ~36 | ~14.0 |
| M27 | 60-200 | 3.0 | ~41 | ~16.0 |
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.

