This 8-piece set contains steel king pin screws specified for the original HPI Savage 21 platform, presented as aftermarket service hardware. The fasteners are intended for the points where the king pin secures steering and suspension linkages and are provided for maintenance and setup work.
Service guidance emphasises compatibility and reliable thread engagement. Replace screws one at a time to preserve alignment, verify thread engagement and apply torque in stages to avoid stripping, and inspect mating bushings and bearings before reuse. Given their steel construction, apply an appropriate thread locking compound and plan inspection intervals to match off-road duty cycles.