March 21, 2017, 6:16 a.m. -  benj

You need this adjustable spanner in your collection for that nut, 4.5mm thick jaw! http://www.bahco.com/en/p/adjustable-wrench-big-opening-extra-thin-jaws/0c-ac-d6-ae-a7-35-51-6a-01-f3-99-bb-4c-8d-c8-e8/