Wire to wire connector, comprising: a cable, comprising at least one conductive core, an insulator surrounding the at least one conductive core and an outer sheath, with a core seal and a core plug being fitted round the insulator of each conductive core in an interference fit; a connector casing, defining a pin hole, with the cable extending into the connector casing from a near side of the connector casing in a longitudinal direction, and the core seal and the core plug of the conductive core being fitted in an interfering manner to an inner surface defining the pin hole of the connector casing, wherein the core seal has a length so as to overlap the corresponding conductive core in the longitudinal direction and so as to be located with its entire length within the connector casing with respect to the longitudinal direction, wherein the core plug of the conductive core is closer than the core seal is to the near side of the connector casing in the longitudinal direction, and wherein the core plug has a first part fitted into the pin hole in an interfering manner, and a second part abutting an end face of the near side of the connector casing, wherein the core seal and the core plug are made of an insulating material; at least one pin, the pin comprising a pin body, a first crimping structure crimped to the core seal, a second crimping structure crimped to a conductive outer surface of the conductive core, and a stop structure preventing the pin from moving in the longitudinal direction; and an overmoulded casing that is overmoulded on at least a part of the connector casing and on a part of the outer sheath of the cable. a cable, comprising at least one conductive core, an insulator surrounding the at least one conductive core and an outer sheath, with a core seal and a core plug being fitted round the insulator of each conductive core in an interference fit; a connector casing, defining a pin hole, with the cable extending into the connector casing from a near side of the connector casing in a longitudinal direction, and the core seal and the core plug of the conductive core being fitted in an interfering manner to an inner surface defining the pin hole of the connector casing, wherein the core seal has a length so as to overlap the corresponding conductive core in the longitudinal direction and so as to be located with its entire length within the connector casing with respect to the longitudinal direction, wherein the core plug of the conductive core is closer than the core seal is to the near side of the connector casing in the longitudinal direction, and wherein the core plug has a first part fitted into the pin hole in an interfering manner, and a second part abutting an end face of the near side of the connector casing, wherein the core seal and the core plug are made of an insulating material; at least one pin, the pin comprising a pin body, a first crimping structure crimped to the core seal, a second crimping structure crimped to a conductive outer surface of the conductive core, and a stop structure preventing the pin from moving in the longitudinal direction; and an overmoulded casing that is overmoulded on at least a part of the connector casing and on a part of the outer sheath of the cable.