本标准规定了带有UN和UNF螺纹的腔体的相关尺寸，其中安装了两端口、三端口和四端口旋入式插装阀，以确保尺寸互换性。注:尺寸为4、7和12的空腔尺寸，见制造商建议。空腔尺寸4、7和12可在本文件的未来版本中添加。它适用于工业、农业、采矿和移动设备中通常使用的两端口、三端口和四端口旋入式插装阀。

This standard specifies the dimensions relating to cavities with UN and UNF threads in which two-, three-, and four-port screw-in cartridge valves are mounted, in order to ensure dimensional interchangeability.NOTE: For size 4, 7 and 12 cavity dimensions, see manufacturers' recommendations. Cavity sizes 4, 7 and 12 may be added in future editions of this document.It is applicable to two-, three-, and four-port screw-in cartridge valves generally used in industrial, agricultural, mining and mobile equipment.