A suitable spanner is available separately for the chassis mount plug and socket - see stock no. 157-2770.
Binder 723 Series
Binder 723 series plugs and sockets feature brass nut screw-coupling mechanism and plastic insert with solder termination. The screw coupling mechanism incorporates a gasket, sealing the cable mount connectors to IP67 when mated and locked together in-line, or with the relevant chassis mounted connectors.