I guess I won't need it for a while. That bolt broke off in the rear end cover and I have to take off the exhaust to get to it. While I was searching this, I came up with an article that B&H Machine went bankrupt. I don't know if that's the same company, but it said they supplied GM. That's why I wondered if someone still sold these bolts somewhere as I found LI Corvette does sell some bolts that have the B&H headmark.