I had a look at what you posted, thanks, but those are not the style on it. The o-ring on this truck is not a "face seal" like a ors fitting, inside the female fitting their is a small tube with a o-ring on the outside that slides into the inside of the male fitting on the truck, its really hard to explain, i tried searching the internet but no fitting type diagrams were clear enough to determine what style it is. Was just hoping someone has run into this before and knew the type. Thanks