Help measuring bolt pattern

A little Google shows there actually ARE people calling 5X4 by the metric measurement of 101.6. This is totally stupid and wrong!!! This would be like, EG, converting 1/2" pipe to metric and going around expecting plumbing stores to carry "12.7mm pipe"

"You guys have any 9.525mm bolts?"

"Uh, whut??"

(3/8 bolt)