front shocks

Had one in my workshop today. Had to use an impact socket, a Sidchrome crack bar and a piece of pipe extension on the bar. The nut had "frozen" and boy was one tight. Once it cracked I could then undo it with a rattle gun. Bob

If it is a bolt head, then hit the bolt head,the flat top of it, with a hammer a few times.
The shock wave which travels down the bolt shank vibrates the threads and often loosens the bolt so it can be unscrewed.