William, I had made them all manually on a lathe and a couple things on a mill but they were too time consuming to keep on with. Also a bit of motivation was lost after doing 80+ of them. Its a bit repetative and tedious by then
Aullido, it is a M36x2 thread. Not much advise though. Without a lathe its pretty much impossible to do. Check out the other diy threads using a garden attachment.