The International B120 uses H6024 bulb size for both high beam and low beam headlight applications. The replacement chart covers 1959 to 1960 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 12V. It conforms to ANSI standards recognized in both the United States and Canada, meaning its physical and electrical characteristics follow a defined industry specification rather than a proprietary design.
Unlike bulb types that allow the light source to be replaced independently, the H6024 is a sealed beam unit. When the filament fails, the entire assembly is replaced as a single component.
The International B120 uses the H6024 for both the high beam and low beam headlight positions across the 1959-1960 model years. A single bulb type serving both functions is a characteristic of certain sealed beam configurations from that era.
Because the H6024 meets an ANSI standard, units produced by different manufacturers to that specification are generally interchangeable, provided they conform to the same standard designation.