S-98930A323 M20 x 60 mm ASME B18.5, ISO 8678 Carriage Bolts

Key Features & Benefits at a Glance

• Superior Anti-Rotation Performance: The integrated square neck securely locks into materials, preventing the bolt from spinning during installation and ensuring reliable, permanent fastening.
• High Tensile Strength for Demanding Loads: Class 8.8 strength grade and 120,000 psi tensile strength provide exceptional resistance to stretching and breaking under heavy-duty applications.
• Enhanced Durability and Wear Resistance: Made from hardened steel with a Rockwell C22 hardness, offering excellent resistance to deformation and long-term wear in harsh environments.
• Optimized for Quick and Secure Assembly: The coarse 2.5mm thread pitch and fully threaded M20 shank allow for faster driving and a stronger grip in wood and metal substrates.
• Wide, Rounded Head for Surface Protection: The carriage-style head distributes clamping force over a wider area (43mm diameter), minimizing surface damage and providing a finished appearance.
• Precision Manufacturing for Consistent Fit: Threads are manufactured to Class 6g tolerance, ensuring reliable compatibility and a secure fit with standard M20 nuts.
• Guaranteed Compliance and Safety: Meets ASME B18.5 and ISO 8678 dimensional standards, and is RoHS 3 & REACH compliant for safe use in regulated industries.

Professional Applications & Engineering Value

This M20 carriage bolt is engineered to solve critical fastening challenges in industrial applications where vibration, heavy loads, and security are paramount. The square neck design is a key engineering feature that eliminates the need for a second tool to prevent rotation, significantly speeding up assembly in structural woodwork, machinery framing, and trailer construction. The Class 8.8 steel construction and Rockwell C22 hardness ensure the fastener will not fail under the high tensile strength demands of these environments. The fully threaded coarse thread profile provides maximum pull-out resistance in softer materials, making it an indispensable heavy-duty component for engineers and builders who require a reliable, high-strength connection that won't loosen over time.

Specification Summary & Compliance

This bolt features a Metric M20 thread with a 2.5mm coarse pitch and a Class 6g thread fit for standard tolerance. It is manufactured to meet the dimensional specifications of ASME B18.5 and ISO 8678. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of hazardous substances for global industrial use.