If you service a TRF421 chassis, the Tamiya 9803476 2x18mm countersunk hex screws are a practical choice for secure assembly. They are engineered to give a snug, low profile connection that helps maintain setup consistency.
The countersunk head allows these screws to sit flush, keeping body panels and chassis plates tidy and reducing aerodynamic disruption. They are useful where clearance and neatness matter.
Made from robust material, these hex screws cope with repeated use and the knocks of club tracks. They keep parts locked in place during spirited driving and regular handling.
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