Got An Old Grinder?

[Phillyrube]

Found an old Central Machinery grinder in the trash. Rewired it and good as new. Missing the left hand thread arbor nut. Its an odd size, and Harbor Freight support says buy another grinder.
Anyone got an old grinder they wont mind stripping for parts?
Its between 1/2and 9/16, threads between 12 and 15.
(Site wont lete post in Wanted ????)

 

[dlromo]

Should be a universal 5/8x11 thread, google grinder flange nut or on Amazon

or just buy wheels with a hub

 

[Phillyrube]

5/8 is too big. Appears to be a proprietory thread.