The component with the lowest price in the FAN COVER/SHROUD schematic is the Screw,tapping,4x1.
This FAN COVER/SHROUD assembly utilises four Bolt,sh-ct,6x25(s) - the highest specified component.
Some items from this specific schematic: Bolt,sh-ct,6x25, Shroud Comp., Fan Cover Comp, Screw,tapping,4x1.