To me, it looks like the factory pressed flange at the end of the stud went away. The quick and durable fix is to remove the stud and replace it with a double nutted bolt making sure to have a washer under the bolt head and next to the nut ( sandwich the shock.) I've also made a stud out of a bolt by cutting off the head and threading the end for a nylock nut. Makes it easier to remove the shock in the future instead of having to remove the whole bolt. Very important to have smooth shank inside the shock sleeve and not threads.
