Quote:

Interesting...

Using them for fuel system, supply and return.



I would not worry about them at all i have used them on fuel,transmission fluid,and oil systems and have never had a failure.
I only use Aeroquip and this info is straight out of their catalog.
The socketless hose and fittings are rated at 250psi and a temp range from -40 to +300 degrees.

70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake

best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4