Yokomo YOKZCS320 Thin 3.1 x 5 x 0.2mm Washer for Model Cars  [YOKZCS320]

3.1 x 5 x 0.2mm shim for model car chassis alignment

This is an RC-scale shim for fine spacing and tolerance adjustments on model car chassis. The 3.1 x 5 x 0.2mm figure denotes the shim size and thickness used when matching parts to manage axial clearance or to correct gear mesh issues.

Practical uses include taking up shaft endplay, setting bearing preload, and trimming engagement between spur and pinion where minimal thickness differences matter. The shim acts as a compact spacer allowing incremental stack height changes without component modification.

Fitment is straightforward: clean mating surfaces, position the shim at the needed interface, and refit the assembly. After each modification, confirm smooth rotation and engagement, then tweak by adding or removing thin shims until the required clearance and drivability are achieved.