I fitted a remote greasing greasing kit a few months ago.

A week ago, on a grease and inspection job, I noticed that, inevitably I guess, I fitted the plastic pipe incorrectly, and it had snapped off.

So, yesterday, I tried to repair the pipe, and of course, snapped the fitting. I managed to get the stub of the fitting out of the hub, but I've no idea of the thread size I need to replace it.

Help please! 1992 4/4 4str.