Are Sae and Metric the Same?

While the majority of bolt-type fasteners used in the United States conform to one or the other measurement scale, the difference between SAE and metric fasteners (and their corresponding sockets) is as profound as the difference between yards and meters: They are almost the same, but not quite.

Do you need both metric and SAE wrenches?

With wrenches, you also have to deal with both SAE (Society of Automotive Engineers — AKA inches) and metric sizes. Trying to use a combination wrench that's even 1/32 of an inch off won't end well.

What's the difference between metric and SAE?

Metric and SAE fasteners are measured differently and with different vocabulary. SAE nuts, bolts and screws are measured by their thread count, or TPI (threads per inch) and their length. Metric fasteners are measured by length and pitch, or the distance between threads.

Alexander Ross

Alexander Ross

Gaming, Esports & Interactive Media Writer

Alexander Ross has covered the video game industry for a decade, writing deep dives on game design, esports tournaments, VR developments, and gaming culture.