Martin, I thought I might have trouble sending a HTML table. Well anyway, as for "why?" I would say it has something to do with .... conversion chart printers lobbyists. As for conversion in the US, everyone I know (engineering) has charts stuck, hung up, in a drawer, all over the place. With my tools, I always keep in mind that 13mm ~ 1/2" 11mm ~ 7/16" 19mm ~ 3/4" and my crescent wrench is metric on one side and "American" on the other. :) Best regards, Giles ----- Original Message ----- From: "Martin Peach" > The screw system is definitely not the same as the wire system: smaller > screw numbers correspond to smaller screw diameters. Smaller wire numbers > mean thicker wire. Why they don't use pecks and rods to measure things I > just don't know ;-) Why don't they just say 1mm wire when they mean 1mm wire > for instance....these are supposed to be engineers -- oh wait -- I think I > know why. > > /\/\/\/*=Martin > -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.