JB/T 7293.8-2025 in English

This standard specifies the technical requirements for bolts and nuts used in internal combustion engines, specifically focusing on the connecting rod nuts. It covers dimensions, material specifications, mechanical properties, and testing methods to ensure compatibility and performance in engine applications. The standard provides detailed guidelines for manufacturing and quality control, ensuring uniformity across different producers. It also includes information on marking and packaging to facilitate identification and proper handling during storage and transportation. The document is structured to support both design and production processes, promoting consistency and reliability in the industry.