Got an el cheapo weed sprayer with plastic tank. The cheesy hose to the
wand they put on it has cracked.

I'd like to put a new, longer hose on it.

Problem being that they have a plastic collar fitting that screws down on a
nipple on the tank, and the nipple has some kind of non-standard thread.
I'm thinking of abandoning it and putting in a new arrangement.

So, what commonly available part or parts are there that I can use to put
through a new hole drilled in the top of the tank that will enable me to
hook a hose up to it?