Maybe gas pump sizes at gas stations are a better example? I see pump dimensions in the law here but don't know if there was traditional regulation on fuel pum

Maybe gas pump sizes at gas stations are a better example? I see pump dimensions in the law here but don't know if there was traditional regulation on fuel pumps being compatible. https://www.law.cornell.edu/cfr/text/40/80.22 https://www.law.cornell.edu/cfr/text/40/80.22