>>I believe Metric spanners* are also measured across the flats, >>so a 13mm spanner will work on a 1/2" UNx bolt if it's not >>done up too tightly! :-) >> > > * wrenches for our US viewers ;) What have wenches got to do with it? Russell -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist