The M3500-A-005 (typically designated in full as M3500-1112100A-005) is a high-pressure common rail fuel injector inlet connector/extension fitting used in heavy-duty diesel engines manufactured by Guangxi Yuchai (YUCHAI).
**Primary Function:** Serving as a core precision component within the fuel injector assembly (e.g., assembly number M3500-1112100A-A38), it is responsible for securely connecting the high-pressure fuel line to the internal mechanism of the injector.
**Applicable Engine Models:** Primarily designed for use with Yuchai's heavy-duty and construction machinery-grade engines—such as the YC6M, YC6MK, and YC6MJ series—as well as select diesel engine series for on-road vehicles and wheel loaders compliant with China's National III and National IV emission standards.
**Material:** Precision-machined from high-strength stainless steel or alloy steel to withstand the fuel injection pressures—often reaching thousands of bars—generated by the high-pressure common rail system.