This kit is an RC-scale set of plastic washers supplied as replacement spares for Tamiya F1-style models, identified by part number 9405643. The assortment includes small-diameter plastic washers used where thin shims are required on F101/102 Group C F1 chassis assemblies.
Applications include adjusting stack heights, isolating metal contact points, and micro-adjusting linkages and bearing preload. They are appropriate for light spacing duties on hubs, suspension arms and other assembly points specified for plastic shims.
Fitting advice: clean all mating faces before assembly, pick washer thickness to achieve the desired clearance, and preserve the original washer order during reassembly. Do not over-compress bearings or sealed joints to avoid stiff operation.
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