I damaged threads on the arbor and nut for a Delta Unisaw 36-L552. I purchased the arbor but Delta doesnt know when the jamnut will be available. Could be months.
Its a right hand thread, 5/8 with .9 pitch or 28 TPI. I heard called extra fine thread. Ive been to hardware specialty stores and even 2 mechanical fab places declined. I think because of the finethread combined with 5/8.

Delta shows a A289885 part number. Maybe you know of another maker that uses the same jamnut?.

Any thoughts on how to get one?