Removing srewed up lug nut (Not stud)

Weld a nut onto the end. I did this once. Just a quick tack weld or two will do it. Lane

I had the same problem just last week. What I did was weld a larger bolt to the existing nut and then just turn it out. I used a 5/8 " bolt about 3" long. The larger bolt gives you more to work with and a good size head to get a wrench on. When welding the threaded end to the nut use a direct ground and protect the wheel from weld splatters with something like grease, sheet metal or welding gloves. Al

Put a paste of Comet cleaning powder on the vise grip jaws.

Sharpen the jaws of the vice grips or put some clover compound on the jaws.

Call around to your local wrecker services and body shops. An impact socket is made just for this purpose. Think of a female "ease out" socket. They work great without taking a chance on messing up your wheels.

OK to elaborate more a quick web search for "emergency wheel lock remover" will show you the socket. It cost about $30.00. We have a local body shop that I have borrowed a socket from before. Call the tire stores too. Someone will have one.

All of the above will work, I have also taken a grinder and grinding two sides parallel and flat, then putting vise grips on it. Worked on all 4 wheels. I had lost the lock hub a long time ago. This is on a ford with the same round nuts...good luck