The International C1000 uses H6024 bulb size for both high beam and low beam headlight applications. The replacement chart covers 1963 to 1964 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H6024 is a 7-inch round sealed beam unit operating at 12 volts. It conforms to ANSI standards applicable in the United States and Canada. Unlike bulb-and-housing systems, the sealed beam design integrates the filament, reflector, and lens into a single unit, meaning the entire assembly is replaced rather than an individual bulb.
The International C1000 uses the H6024 for both the high beam and low beam headlight positions across the 1963-1964 model years. A single bulb type therefore serves both lighting functions on this vehicle.
Because the H6024 is a sealed beam unit rather than a socketed bulb, fitment involves replacing the whole headlight assembly. Compatibility depends on the physical mounting and retaining ring configuration accepting a standard 7-inch round sealed beam.