This ad is for a lot of 60 zinc plated hex 2 way lock nuts. 

I don't know much about these nuts. I put below the info I have to the best of my knowledge;

 

Width across flats: 1 1/16"

Width across corners: 1 1/4"

Thickness: 5/8"

Opening: 13/16"

Threading: Coarse

 

Please look at the pictures carefully, so you know what you are buying.