Discovery, the ones on the rear links and front radius arms... The guy in a video from Tactical Rovers says it's 30mm and the smaller nuts are 15/16. I have a 30mm socket and it fits but a little loose (also 12pt. and not impact type so I'm just checking fit)

Is it really 30mm or is it maybe 1 1/8?

I am buying a 6 pt. impact socket for it.

Thanks