Not saying these are for your application, but I found sone studs that are 11/16" diameter. https://www.amazon.ca/Dorman-610-158-Length-Thread-Serrated/dp/B000DCNT08


A day without laughter is a day wasted- Charlie Chaplin
When wrestling a grizzly bear, you have to keep at it until the bear gets tired, not when you get tired.

1948 Chevy 2-Ton