Mike wrote:
Looks as though we (with our old Colonies) may be out of line
with our new European partners because of our Imperial (no
pun) sizing. We convert 1/2" to 12.7mm, they never had 1/2"
so they use 12mm.

I wonder why they would choose a dozen millimetres rather
than a nice round number, then? Hmm....
--


J.B.