Size of outlet from X1100c fuel tank

I had a problem with junk (spider) blocking my fuel outlet and shutting off my machine. I've been trying to order a spare outlet so I could design a stand-up filter that Kubota should have installed in the first place. I cannot buy just the fitting, but it is part of the complete fuel tank for @ $100. Does anyone know what the thread is, or am I missing something?

SF

Try part # K7591-24160. Opps your right its been replaced by K7591-24100, the whole tank.
Its still in price sheet@ $5.45, you might try several dealers, someone may have old stock.

Not sure what the fuel pick up in the rtv tank looks like but the one in my combine actually has a screen that is roughly the shape and size of your thumb and clamps onto the fuel line in the bottom of the tank.

Here is a picture of something similar