Let's face it, humans like things easy. It's much easier to say "5 mills", than 5 thousanths of an inch", although saying "250 thousanths" seems to be more of the norm when machining in english units. Thickness, such as a plastic bag seems to be expressed in Mills. Confusion, of course.
When connecting thermocouples, RED is negative. Go figure. Even the metric system has it's pecularities, the Angstrom and the micron. My boss once said, he likes numbers to be between 1 and 10. In other words the exponent expressed in words such as nano, micro, pico. I prefer metric too, but when the parts and the tools are English, do as the Romans do and use the unit of measure that the parts are in. ____________________________________________________________________________________ Shape Yahoo! in your own image. Join our Network Research Panel today! http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7