Parts such as the Front Axle: Front Axle, Washer,lock, Bolt (716), Washer(6a1) are included in the Sl338b 1971/1972 Front Axle parts fiche.
The nineteen Sl338b 1971/1972 Front Axle component parts are all listed in this schematic.
On this parts fiche the Bolt (716) is the most specified component.