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.