The International S110 high beam and low beam headlight bulbs both utilize the H6024 bulb size. The replacement chart covers vehicle production spanning 1956 to 1957.
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 a single assembly. When the filament fails, the whole unit is replaced rather than an individual bulb.
The International S110 uses the H6024 for both the high beam and low beam headlight positions across the 1956-1957 model years. A single bulb type serves both functions, which was a common trait of sealed beam systems where one unit handled dual-filament operation.
Because the H6024 is a sealed beam unit rather than a socketed bulb, it is not interchangeable with modern replaceable-bulb housings without modification. The fitment is specific to vehicles designed around the 7-inch round sealed beam format standardized under ANSI guidelines.