This International Standard specifies the mounting dimensions required for the interchangeability of accessories for 16 MPa [160 bar] medium series cylinders in accordance with ISO 6020-1 and for 25 MPa (250 bar) series cylinders, in accordance with ISO 6022. The accessories have been designed specifically for use with cylinders manufactured in accordance with ISO 6020-1 and ISO 6022, but this does not limit their application.NOTE 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2