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What Do Wrench Sizes Mean? [Solved]

The width across flats indicates the nominal “size” of the spanner. It is imprinted on the spanners in millimeter (mm) values. Older British and current US spanners (wrenches) have inch sizes that are imprinted in intermediate sizes in fractions.

MECHANIC MATH - Standard wrench sizes made EASY

Decoding the Standard Imperial System of measurement that we use here in the United States to make it as easy to use as the …

Wrench Sizes video

Understanding fractions to help with

The bolt doesn’t tell me the wrench size to use!

I was once asked “What