Abstract: A connector 1 for facilitating a pressure-tight electrical connection through a well head comprises a hollow body 2 having upper and lower openings 3, 4, a bulkhead 12 provided in the body 2 and a conductor 18 removably held in the bulkhead 12 by a retaining plate 26. A portion of the conductor protrudes from the bulkhead 12 in the direction of the lower opening 4. The conductor 18 has an insulating layer 20 insulating the conductor from the bulkhead 12 and extending along part of the said protruding portion, forming a pressure barrier between the first and second openings 3, 4. Cable strands 34 are crimped to the pins 16 and the joins insulated by tape 40, 42. This construction allows one to fit the cable 30 to the pins before finally sealing the connector in place, which speeds up installation.