What is oil nozzle? Injection nozzle is a key component of diesel engine fuel system and a vulnerable precision couple. Its performance directly affects the fuel consumption, power exertion and ship safety of marine main and auxiliary engines. Therefore, the production of nozzles and the supply of spare parts are very important. Although the oil nozzle is small, it works in extremely harsh conditions. It has high requirements for material quality and processing technology, and is difficult to manufacture.