hi: no where it gos into the fuel shut-off valve, i use the worm-gear type clamps, on all the fuel hose connections. this fuel line fitting, connector, is made of aluminium,. and fits or pushes back into the fuel shut-off valve,. and then you push your fuel hose, onto it. and then slip a clamp, onto the hose,. the problem that i am having right now. is when you push the fuel fitting connector, into the fuel shut-off valve, it will not hold in place in the fuel shut-off valve., that is where the fuel is leaking. thanks