M8 - M30 Galv Bolt Nut 800 MPa Hot Dip Galvanized Bolt Zinc Plated

These bolts and nuts are full hot-dip galvanized standard fasteners with thick uniform zinc coating. They are specially matched to assemble guardrail plates and support posts, featuring outstanding rust resistance and reliable fastening effect for long-term outdoor road projects

Our bolts and nuts are manufactured as full hot-dip galvanized standard fasteners, ensuring each component receives a thick, uniform zinc coating both inside and out. This advanced galvanization process delivers exceptional corrosion resistance, making them ideal for long-term exposure to rain, humidity, salt spray, and extreme temperature variations.

Specifically engineered to match guardrail plates and support posts, these fasteners provide precise thread fit and reliable clamping force, effectively preventing loosening caused by traffic-induced vibration or thermal expansion. Every set is strictly tested for tensile strength, torque consistency, and coating adhesion, guaranteeing stable performance throughout the service life of your highway safety system.

Whether used in coastal expressways, mountain roads, or high-humidity tunnel projects, our hot-dip galvanized bolts and nuts offer maintenance-free durability, significantly reducing the need for periodic replacement and lowering overall project lifecycle costs.

• Zinc coating thickness: ≥85μm, meeting ASTM A153 / ISO 1461 standards
• Anti-rust lifespan: 25–30 years in typical outdoor environments
• Compatibility: Perfectly suited for W-beam, Thrie-beam, and box-beam guardrail systems
• Quality assurance: 100% dimensional inspection and salt spray test certified