Eric
I am not sure what size the thread is, I will have to look, It is a 4" grinder that is only about a year old though and they change what the sell and keep in stock.
I am just a bit frustrated.
Dale,
Thanks for the advice, I have a few harbor frieght tools and know that you get what you pay for, I recently replaced my impact wrench from them with one from NAPA and boy did that make a big difference.
Ed