k12rc

is there a difference between the ones with blue rings and ones with black rings have sourse for latter

Harley Condra

My Feedback: (4)

There are many manufacturers of push in fittings.
Festo shows fittings with blue, black and grey release rings. (The ring color is a visual indicator of the environment the fitting was designed for).
The Festo fittings that have the blue colored rings work with kerosene and Jet-A very well.

Research the various manufacturers literature to find what you need to know.
McMaster-Carr has a large variety of fittings. www.mcmaster.com

k12rc

thanks harley
keith