Missing nut on 6" manual hand grinder

[MSG Jeff]

I have a Prairie Tool Company 6" hamd grinder that
is missing the nut that holds the grinding wheel.
Does anyone know I can get this part and I would like to know about when this grinder wad made.3

 

[Ricky Joe]

I’ve probably got it. Give me specs.

 

[RTM]

Caution. My grinder, not Prairie, had left hand threads, and an odd pitch size required. I scrapped it, took off all useable parts first.