ISO 9159:1988

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Road vehicles — Nozzle spouts for leaded gasoline and diesel fuel

ISO 9159:1988 is an international standard that specifies the dimensions and filling rates of nozzle spouts used for refueling road vehicles, particularly those designed for leaded gasoline and diesel fuel; it includes details about the shape of the nozzle spout and the design features for safe hooking into the fuel tank opening, allowing for cams or depressions on the nozzle for secure connection