The International C110 uses H6024 bulb size for both high beam and low beam headlight applications. The replacement chart covers 1961 to 1962 vehicle production years with corresponding bulb size 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 C110 uses the H6024 for both the high beam and low beam headlight positions across the 1961-1962 model years. A single bulb type serving both functions in this way is characteristic of early sealed beam headlight systems, where one unit handled the full lighting range through dual filaments.
Because the H6024 is a sealed beam unit rather than a bulb-in-housing design, fitment is determined by the physical size and mounting standard of the unit itself. The 7-inch round format was a regulated size under ANSI standards, which allowed interchangeability across vehicles built to that specification.