Parts such as the Headlight(s): Spring,focus Adjust, Nut,leaf Spring,6mm, Nut,4mm,focus Adjust, Washer,6.5x20x1.6 are included in the Kaf400-aef Mule610 2014 Usa / 4x4 Headlight(s) parts fiche.
Check out any of the twenty Headlight(s) components enlisted.
In this schematic the "Screw,tapping,6x20" is used most often.