5/8 Socket To Mm. 0 625 x 25 4 15 875 mm. Most if the time you will find socket sizes are written as a fraction of an inch eg 5 8 this is also called an sae or imperial measurement.
Using sae sockets on a metric bolt can cause stripping or break the fastener. How to convert sae sizes to metric. Converting sae socket sizes to metric measurements is fairly easy if you have a calculator at hand or are excellent at mental arithmetic.
Again i ve never seen one that big though.
5 8 0 625 in. This size will work fine. Too loose and the socket slips. We all have a mix of wrenches in our tool boxes.