[johnkosir]

712 2004 had 5/16 24 right hand thread bolt, do not remember what grade it was, if you used 1/2 wrench it was 5/16, if you used 7/16 it was 1/4,you should be able to look at the head that broke off and tell the grade . That shaft looks like it is damaged and will have to be repaired or replaced if you want the re[air to last