Thanks for the replies, I’ve made a tool to tighten down the dome nuts out of a grinder spanner. I’ve brought 2 mm cork gaskets for the outer seal , my current problem is that the old dome has corroded so I’ve used another one , but this one gives a gap of approx. 3mm because of the shoulder / dome contact. Is it possible to use two gaskets ? or can I reduce the height of the shoulder ?
