The component with the lowest price in the FUEL TANK schematic is the Nut-hex-small.
Some items from this specific schematic: Tank-comp-fuel, Damper, Band,fuel Tank, Washer-spring,8mm.
With all the components that make up the KAF620-B1 MULE2520 1993 USA, CANADA FUEL TANK assembly. The Damper,battery is the most frequently specified with three applications.