conduit thread problems.

[photoman290]

hi all i have a question for any electricians or engineers. i want to fit a metric rose joint to a 25mm gavanised conduit coupler. i cant find any info on the thread on the conduit. i need to know what size thread so i can choose the right size rose joint to fit a metric thread. if will fit a conduit thread that is. otherwise i can tap the inside of the conduit if i know the inside size. next stage of my simulator motion platform.

[countrypaul]

Thought the small electrical condiuit was M20 x 1.5.

Die for conduit: https://www.bes.co.uk/metal-conduit-die-for-20mm-thread-16337

I am not an electrician so beware there may be other options.

OK, if I read it properly the first time I would have seen the reference to 25mm! So try M25x1.5