A sample from the products for the F-16 Final Driven Gear include: Bolt, Stud 10x45, Gear,final Driven, Spacer,ring Gear, Bolt,flange 10x38.
In this schematic the "Bolt,flange,8x32" is used most often.
The lowest price component in this F-16 Final Driven Gear parts-list fiche is the Washer 8mm.