Circular Connector, Ecomate C016 Series, Flange Mount Receptacle, 3 Contacts, Screw Socket. The C016 20G003 100 12 from Amphenol is an ecomate circular female receptacle connector with 3 + PE contacts. The ecomate series provide easy operation, reduced dimensions, robust design, quick and easy assembly. This connector’s main area of application is in the field of plant construction and machine building