[R-390] OT Need Amphenol mil connector help

[Phil]

I'm looking to buy single pin mil style amphenol connectors
and 12-5P and 12-5S are the numbers I know now.....these
are a chassis mount male and a cable mount female.  It seems
that I remember a company named Williams or some such that
specialized in these mil type connectors but I cannot find a link
or reference.  Can anyone help with a pointer to them?

thanks, Phil