ttpete
Well-known member
A lot of Ford's use a 6.3mm on which a 1/4 socket will work fine. These are 1/4 drive.
SK is the only company that makes a 6.3mm socket, that I'm aware of at this time.
Where is this fastener used? Because 6.3 mm is .2480", just .002" short of .25" or 1/4" Does it have a metric thread or is it American?