Circular connector ID help

Appears to be close to an M16 but I’m having trouble identifying an exact match. Ultimately looking to buy an extension cable.

  • 6 pins
  • keyed
  • Pitch is about 3mm
  • OD of plastic barrel on male end is 11mm

The connector looks like the option on the link below.

Mating product is listed below on the product page. We do not have a complete cable assembly with the mating connector.

Tech ref# T4046756