Abstract: A fuel tank having a top shell with an outwardly extending flange about its outer periphery and a bottom shell also having an outwardly extending flange about its outer periphery. The top and bottom shells are dimensioned so that, with the top shell positioned on top of the bottom shell, an outer peripheral portion of the top shell flange flatly abuts against an outer peripheral portion of the bottom shell flange and these outer peripheral portions are secured together. A component support has an outer edge portion sandwiched in between the flanges at a position spaced inwardly from the flange outer peripheral portions. The flanges and the outer edge portion of the component support are then bent to a plane oblique to the component support to thereby mechanically lock the outer edge portion of the component support and the flanges together.