Someone here has mentioned about this clip (or heater hose hook) before and not sure who it was? Maybe Jim? This is the first time I have ever found one of these hooks. It goes on the bottom of the heater core box and holds a heater hose. I had the parts car for almost two years and just now found it. This hook has been long lost on both of my Jetfire cars. I didn’t even now how it fit on the box till now either. It just pops in an oval hole and twists 90 degrees into place. No wonder they get lost. I almost think it would be better to cut the nub off and drill it for a pop rivet. I will keep it like original and just hope it don’t fall off at some point.