Souriau Sunbank by Eaton, SMS Female Connector Housing, 4 Way, 1 Row

SMS series quick mating panel mount receptacle housings with a compact design that snap and lock into panel cut-outs enabling quick assembly and installation without the need for any additional hardware. These SMS series quick mating panel mount receptacle housings also feature positive housing retention latches and positive polarization keys to prevent mismating.
These SMS series quick mating panel mount connectors use size 16 TRIM TRIO 1.6mm diameter snap-lock pin and socket contacts which need to be purchased separately (see stock number 687-6364 typically)
For mating connectors see SMS series quick mating cable mount plug housings

Souriau SMS Series Quick Mating Wire to Board Connectors