The ip67 connectors can be used for both cable to cable (in-line) or cable to panel-mount connections.

SP17 connector is the medium sized plastic shell IP68 waterproof connector.

OL21 connector is  a large sized plastic shell IP68 waterproof wire connector.The user can attach the wires to the connector by solering & screw.

IP68 Waterproof Cable Connector securely splices cables up to 5 conductors. Ideal for outdoor lighting systems or humid environments, this accessory has durable plastic housing and rubber gaskets to resist corrosion and seal out moisture.

M20 connector is screw type IP68 waterproof electrical connector.

The user can attach the wires to the connector by screw.

Olink company produce Plastic push pull connector with alignment key for medical applications.