"John Schmitt" wrote in message ...

The ISO series of threads goes up to 1.25 mm pitch at 10mm, after
it omits 9mm.

No such omission. M9 exists, and so does M7. I've got taps & dies to prove
it :-). They're not commonly used sizes (any more than 7 & 9 BA are) but
they certainly exist.

--
Andy