S-98930A216 M8 x 20 mm ASME B18.5, ISO 8678 Carriage Bolts

Key Features & Benefits at a Glance

• Superior load-bearing capacity with 110,000 psi tensile strength and Class 8.8 grade steel for reliable performance in demanding environments.
• Anti-rotation security provided by the integrated square neck, ensuring the bolt stays firmly in place during and after installation.
• Wide, rounded carriage head distributes clamping force evenly and offers a finished appearance while reducing surface damage.
• Coarse 1.25mm thread pitch enables faster assembly and better resistance to vibration loosening in heavy machinery and structural applications.
• Precision threading with Class 6g fit and full metric M8 threading ensures consistent, secure fastening and interchangeability.
• Enhanced durability from Rockwell C22 hardness, providing excellent wear resistance and long service life.
• Regulatory peace of mind with compliance to ASME B18.5, ISO 8678, RoHS 3, and REACH, meeting international industrial and environmental standards.

Professional Applications & Engineering Value

This M8 carriage bolt is engineered to address critical fastening challenges in heavy-duty industrial and construction settings. The Class 8.8 steel construction and fully threaded design deliver high tensile strength and uniform stress distribution, preventing joint failure under dynamic loads. The square neck is a key feature that locks into the mating material, eliminating rotation during torque application—saving installation time and reducing the risk of stripped threads or loose connections. With a coarse thread pitch of 1.25mm, the bolt is ideal for wood, metal framing, and machinery where vibration resistance and quick assembly are priorities. Its rounded head and metric threading make it suitable for OEM equipment, agricultural machinery, and structural supports, providing a dependable, long-lasting fastening solution that meets rigorous ASME B18.5 and ISO 8678 specifications.

Specification Summary & Compliance

This carriage bolt features a metric M8 thread size with a 1.25mm coarse pitch and Class 6g thread fit, ensuring precise dimensional accuracy per ISO standards. It is manufactured from steel with a Rockwell C22 hardness and complies with ASME B18.5 and ISO 8678 for consistent quality and performance. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for industrial use.