Torque values for fuel line ball seat hose fittings?

[oly]

What are the torque values for fuel line ball seat hose fittings for the three fuel line part numbers below?

930 110 595 05
930 110 411 03
930 110 509 01

The picture that I attached shows the lines (sorry, I can't remember who to give credit for the picture too).

Or are these the type of connection that doesn't have torque values and are more of a tighten gently connection?

If it matters, this is for a 1985 Carrera 3.2.

[KTL]

Snug................. Honestly, you can't really torque these unless you're planning to use a crowsfoot wrench head on your torque wrench.

But here's some information from Earl's (VERY good quality hose manufacturer) about how tight is tight enough for hose fittings. You can see the smaller fittings have rather light torque specs. The larger ones have much higher tightening torques.




The fittings on the Porsche lines are M12 x 1.5 which is generally comparable to AN-8 size (1/2 inch). The key is to lubricate the mating surfaces so you don't mar the spherical/conical male end or the female convex seat

[oly]

Perfect, thanks KTL!

[oly]

If anybody is interested, here's a site with the page that KTL gave:

http://www.vansaircraft.com/pdf/Torque_Spec_Aluminum_Fittings.pdf