Fasteners for machinery, equipment, and parts can be measured using the metric system or the standard U.S. If you are constructing equipment, even if you're in the U.S., it's better to use metric fasteners instead of inch-based fasteners. You'll find a wider audience for your products, and you'll have an easier time dealing with variations that require other fastener sizes. More Compatible With International Machinery Equipment made outside the U.S. uses metric fasteners, and if you import or export equipment, you do not want to have to convert standard/Imperial measures to metric.
5 January 2023