What is the part circled in red called and can it be replaced?
When bleeding I had a fine mist of brake fluid squirting out of the top of the connector (yellow arrow) where the hardline fits into the coupling nut. I reflanged the hard line and when reconnecting the coupler have found it not biting, as if it the male coupler or the female end is stripped. How difficult do you think it would be to tape the female side? Any advice is appreciated.