How tight should brass air hose fittings be set to?

Question

The hose that came with my compressor was too small so I decided to upgrade the size. The one that I bought has male threaded ends.

I have a brass connector piece that has a female threaded end to screw onto the male hose end as well as the standard male end to go into the quick release thing on my compressor.

My question is, when I attach the adapter piece of the hose, how tight should I make it?

If
1 = light finger tightning
2 = medium finger tighting
3 = tight finger tightning
4 = max finger tightning
5 = 4 + a light wrench tightnen
6 = 4 + a medium wrench tightnen
7 = 4 + a tight wrench tighten
8 = 4 + maximum wrench tighten

Does anyone recommend teflon tape on the threads?

Thanks

Answer 1

Teflon tape: Yes.

Tightness: #5 or 6

You don't want to overtighten, as brass strips easier than steel. But you want it so it won't come loose during everyday use.

Answer 2

Brass Air Hose Fittings

Answer 3

Teflon tape always.
Minimum # 5. Check for leaks and go up a step at a time until the leak stops.

Answer 4

Tape or pipe dope, then tighten to #5 - check for leaks with soapy water (look for bubbles). If it leaks, progress to #6, repeat until it doesn't leak.

A really small leak will make shaving cream instead of bubbles.