This plastic washer pack is provided as replacement spares for Tamiya F1-style RC kits and is catalogued as part number 9405643. It supplies a range of thin plastic washers used to dial in spacing where precise shims are required on F101/102 Group C F1 chassis parts.
They are used to modify stack heights, stop metal contact, and fine-tune link and bearing preload. These parts suit light-duty spacing roles on wheel hubs, suspension links and related mounting points that call for plastic shims.
Practical notes: make sure surfaces are clean before fitting, match washer thickness to the correction needed, and keep the original washer order to preserve suspension geometry. Avoid over-tightening assemblies to prevent binding in moving parts.
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