The ISO 3601 metric-size O-rings quickreference chart lists the O-rings in millimeters, with IDs from 0.74 to 658.88 mm, and cross sections (widths) from 1.02 to 6.99 mm The ISO 3601 metric-size O ...

But many others view the move away from the world-standard metric system as pure rubbish. Since becoming prime minister, Boris Johnson has pledged to usher in an era of "tolerance towards ...