Grade 14.9 Ultra-High Strength Connecting Rod Bolt
The Grade 14.9 Ultra-High Strength Connecting Rod Bolt is engineered for the most highly stressed joints in a combustion engine. Produced from specialized alloy steel with advanced processing, it reaches a tensile strength above 1400MPa — a level that allows a smaller, lighter bolt to carry the load previously requiring a larger fastener.
Connecting rod bolts are fatigue-critical: they are loaded and unloaded with every revolution of the engine. This bolt is built with exceptional fatigue life, and its resistance to delayed fracture protects against the hydrogen-related failure mode that can affect very high strength fasteners after installation.
Precision-engineered threads and rigorous surface treatment ensure the specified clamping axial force is achieved and held, even under high-load impact. That combination — extreme strength, predictable clamping and lightweight construction — is what makes the part a core fastening solution for engines designed around both performance and weight reduction.
Primarily utilized in high-performance passenger vehicle engines, heavy-duty diesel engines and racing drivetrain systems, these bolts are also deployed in safety-critical applications such as wind power generation, aerospace structures and high-end hydraulic systems.
They meet the demand for connections that combine extreme structural strength with reduced mass.
