Super Jet What is the size of the stock prop/nut?

I'm trying to replace the stock prop in my 96 SJ but I do not have a wrench big enough to fit on the nut (the one that is molded into the front of the prop) of stock prop and I really don't want to bitch it all up with a pipe wrench. I have the spline tool to hold the drive shaft but I want to buy a wrench so I can break the prop loose. Does anybody know what size it is? Thanks
 
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