S-98930A218 M8 x 30 mm ASME B18.5, ISO 8678 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance thanks to the integrated square neck design, preventing the bolt from turning during installation and ensuring a secure, permanent fit.
• Exceptional strength and durability with a Class 8.8 strength grade and 110,000 psi tensile strength, making it ideal for heavy-duty industrial and construction applications.
• Enhanced material longevity provided by the steel construction and Rockwell C22 hardness, offering excellent resistance to wear and deformation.
• Reliable and quick installation with a fully threaded M8x1.25 coarse thread and right-hand direction, allowing for fast assembly and a strong hold in various materials.
• Secure and wide-bearing surface from the 18mm diameter rounded carriage head, distributing load effectively and reducing the risk of surface damage.
• Guaranteed dimensional precision with a Class 6g thread fit, ensuring consistent performance and compatibility with standard metric nuts and components.
• Comprehensive compliance assurance meeting key international standards, providing peace of mind for regulated and demanding environments.

Professional Applications & Engineering Value

This M8 steel carriage bolt is engineered to solve critical challenges in industrial fastening and construction assemblies. The square neck design is a key engineering feature that locks securely into the mounting material, effectively eliminating rotation and solving the common problem of loosening under vibration or dynamic loads. Manufactured from high-grade steel with a Class 8.8 strength rating and Rockwell C22 hardness, it delivers the necessary tensile strength and durability for structural connections, wood-to-metal fastenings, and heavy machinery. The fully threaded metric coarse thread (M8x1.25) ensures deep engagement and a robust clamp, making it a reliable choice for applications where failure is not an option. Its rounded head with a wide profile provides a finished appearance while minimizing surface marring.

Specification Summary & Compliance

This carriage bolt features an M8 x 1.25 coarse thread with a Class 6g thread fit for precise dimensional tolerance. It is manufactured in compliance with ASME B18.5 and ISO 8678 specifications. The product is also confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for hazardous substances.