[urq] Thread Particulars

[fdekat]

I'm looking at changing some of the fuel plumbing.

I'd like to know what the 'threads' are, on the fittings on the end of the
fuel lines.  Are they of some sort of standard industry wide sort (AN?), or
are they some special Audi invention?

Also, I'd like to know what the threads are for where the oil pressure
senders are, in order to "T" in a fitting for an oil pressure gauge. 
What do you use? I'm sure it's not 'normal' Nort American pipe thread..!
(MC Motor, if it matters)

Regards,

 -Frank de Kat-