Hirschmann C16-1 Series or similar connectors offer 4 or 7 way (3 and 6 with plus a P.E. - or pre-engaging - earth contact). For further technical information see specifications. A quality industry-standard connector.
Electrical: 6 Pole + PE
Contact Resistance: <5mohm
Temperature range: -40DegC to + 100DegC
Housing: Polyamide 6.6
Strain Relief: Screw clamp/Ring and Gland Nut (9mm)