The Nut,hex 8mm is the lowest priced item on this Front Crankcase Cover(trx 500fe/fpe) schematic.
The most expensive part in this assembly is the Motor Assy Contro.
A sample from the products for the Front Crankcase Cover(trx 500fe/fpe) include: Cover Comp,fr Cra, O-ring,8.2x1.5, Sensor Assy,angle, O-ring Angle Sens.