Establishes metric mounting dimensions for cylinders as required for interchangeability of commonly used hydraulic cylinders. Includes the bore sizes as follows: 50, 63, 80, 100, 125, 160, 200, 250, 320, 400, 500 mm. Gives the following mounting styles: MF3, MF4, MP3, MP4, MP5, MP6, MT4 (tables 2 to 4 and figures 2 to 4).