International C1300 high beam and low beam headlight bulbs both utilize the H6024 size. The replacement chart covers 1963 to 1964 vehicle production 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 follows the ANSI standard used in the United States and Canada, meaning the entire housing, lens, and filament are fused into one assembly. When the filament fails, the whole unit is replaced rather than an individual bulb.
The International C1300 uses the H6024 for both the high beam and low beam headlights across the 1963-1964 model years, meaning a single sealed beam type serves both lighting functions on this vehicle.
Because the H6024 is a sealed beam unit rather than a socketed bulb, it is not interchangeable with bulb-style replacements. Any substitute must match the 7-inch round sealed beam form factor and ANSI rating to fit correctly.