IEC 61076-2-101:2008 describes circular connectors M12 typically used for industrial process measurement and control. These connectors consist of fixed and free connectors with screw-locking. Male connectors have round contacts of diameters 0,6 mm, 0,76 mm, 0,8 mm and 1,0 mm. This new edition includes the following significant technical change with respect to the previous edition: the connector type M8 has been removed from IEC 61076-2-101 and has been published in a separate IEC Standard under reference IEC 61076-2-104. The contents of the corrigendum of March 2010 have been included in this copy.