I have a very good 12" Chicago Electric older 91852 miter saw. I am looking for the left handed thread bolt that holds the blade in place. What I need is either a source or part number for the bolt or the size so that I can order one. I know that I can go to an industrial hardware store but the closest is $30 in gas away and if I can avoid that and just order one would be great. Anyone have any help for me on this?