ISO 13948-1:2015规定了柴油喷油泵和喷油器上用于连接低压燃油、润滑油或气源的机械螺纹连接的尺寸和要求。 ISO 13948本部分介绍了五种类型的螺纹连接（A至E型）。A型通常用于泵和喷油器，而B至E型仅用于柴油喷油泵。 注:燃油滤清器的低压连接包含在其他国际标准中；参见参考书目。ISO 2974涵盖了泵和喷油器的高压端连接

ISO 13948-1:2015 specifies dimensions and requirements for mechanical, threaded connections used on diesel fuel injection pumps and fuel injectors for the connection of low-pressure fuel, lubrication oil or air supply. Five types of threaded connections (types A to E) are described in this part of ISO 13948. Type A is commonly used for both pumps and injectors, while types B to E are for diesel fuel injection pumps only. NOTE: Low-pressure connections to fuel filters are covered in other International Standards; see the Bibliography. High-pressure end-connections for pumps and injectors are covered in ISO 2974