An electrical heater comprising a heating member, a cable, and a connector, wherein: the heating member includes a thermally conductive sheath, a resistance heating element, a first lead, and a second lead, the resistance heating element being disposed within the sheath, the first and second leads (34, 38) being coupled to the resistance heating element and extending from a proximal end of the sheath; the cable includes an insulating jacket, a first wire, and a second wire, the first and second wires (70, 74) being disposed within the insulating jacket and extending from a proximal end of the insulating jacket; and the connector couples the heating member to the cable, characterized in that the connector includes: a first fitting including a first connecting portion and a head portion, the first connecting portion defining threads disposed about an axis, the head portion being axially adjacent to the first connecting portion, the head portion defining a slot open through an end of the head portion that is opposite the first connecting portion, the first fitting including a first central bore disposed about the axis, the first central bore being open to the slot and open through an end of the first connecting portion that is opposite the head portion, the proximal end of the sheath being received in the slot and welded to the first fitting, the first lead extending from the sheath into the first central bore, the second lead extending from the sheath into the first central bore; and a second fitting including a second connecting portion that defines threads threadably engaged with the threads of the first fitting, the second fitting defining a second central bore disposed about the axis, wherein an end of the cable extends into the second central bore, the first wire is coupled to the first lead for electrical communication therewith, and the second wire is coupled to the second lead for electrical communication therewith. the heating member includes a thermally conductive sheath, a resistance heating element, a first lead, and a second lead, the resistance heating element being disposed within the sheath, the first and second leads (34, 38) being coupled to the resistance heating element and extending from a proximal end of the sheath; the cable includes an insulating jacket, a first wire, and a second wire, the first and second wires (70, 74) being disposed within the insulating jacket and extending from a proximal end of the insulating jacket; and the connector couples the heating member to the cable, characterized in that the connector includes: a first fitting including a first connecting portion and a head portion, the first connecting portion defining threads disposed about an axis, the head portion being axially adjacent to the first connecting portion, the head portion defining a slot open through an end of the head portion that is opposite the first connecting portion, the first fitting including a first central bore disposed about the axis, the first central bore being open to the slot and open through an end of the first connecting portion that is opposite the head portion, the proximal end of the sheath being received in the slot and welded to the first fitting, the first lead extending from the sheath into the first central bore, the second lead extending from the sheath into the first central bore; and a second fitting including a second connecting portion that defines threads threadably engaged with the threads of the first fitting, the second fitting defining a second central bore disposed about the axis, wherein an end of the cable extends into the second central bore, the first wire is coupled to the first lead for electrical communication therewith, and the second wire is coupled to the second lead for electrical communication therewith. a first fitting including a first connecting portion and a head portion, the first connecting portion defining threads disposed about an axis, the head portion being axially adjacent to the first connecting portion, the head portion defining a slot open through an end of the head portion that is opposite the first connecting portion, the first fitting including a first central bore disposed about the axis, the first central bore being open to the slot and open through an end of the first connecting portion that is opposite the head portion, the proximal end of the sheath being received in the slot and welded to the first fitting, the first lead extending from the sheath into the first central bore, the second lead extending from the sheath into the first central bore; and a second fitting including a second connecting portion that defines threads threadably engaged with the threads of the first fitting, the second fitting defining a second central bore disposed about the axis, wherein an end of the cable extends into the second central bore, the first wire is coupled to the first lead for electrical communication therewith, and the second wire is coupled to the second lead for electrical communication therewith.