S-98930A126 M8 x 40 mm ISO 8678 Carriage Bolts
Carriage Bolts
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Basic Information
Head Parameters
Neck & Shank Parameters
Dimension Parameters
Thread Parameters
Material & Strength Parameters
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Key Features & Benefits at a Glance
- Superior corrosion protection with zinc yellow-chromate plating, extending service life in harsh environments
- Exceptional tensile strength rated at 110,000 PSI (Class 8.8), ensuring reliable performance under high-stress conditions
- Secure anti-rotation locking via the integrated square neck, preventing loosening during vibration and dynamic loads
- Optimized thread engagement with coarse M8 x 1.25mm metric threading for faster assembly and robust connections
- Precision manufacturing to ISO 8678 standards, guaranteeing dimensional accuracy and consistent quality
- Wide-rounded carriage head design for enhanced load distribution and reduced surface damage
- Durable material hardness of Rockwell C22, providing excellent resistance to wear and deformation
Professional Applications & Engineering Value
This M8 carriage bolt is engineered to address critical challenges in industrial assembly, where vibration resistance, corrosion prevention, and structural integrity are paramount. The zinc yellow-chromate plated steel construction offers a robust barrier against moisture and chemicals, significantly reducing maintenance needs in outdoor or corrosive settings like agricultural machinery, construction frameworks, and automotive undercarriages. The square neck design securely locks into mating materials, eliminating spin-out during torque application and ensuring stable fastening in wood-to-metal or composite joints. Fully threaded with a coarse pitch (1.25mm), it enables quick installation and high clamp force retention, making it ideal for heavy-duty applications requiring Class 8.8 strength and compliance with ISO 8678 for reliable, repeatable performance.
Specification Summary & Compliance
This carriage bolt adheres to ISO 8678 dimensional and performance standards, featuring M8 coarse threads with a Class 6g tolerance for precise fit. The fully threaded right-hand design ensures uniform stress distribution, while the Rockwell C22 hardness and 110,000 PSI tensile strength meet rigorous industrial demands. Materials and plating processes comply with RoHS and REACH environmental regulations, providing a safe, durable fastening solution for global supply chains.
