The International S2125 uses H6024 bulbs for both high beam and low beam headlight applications, with this bulb size representing the standardized specification for the model. The replacement chart covers 1980 to 1981 production years and documents headlight bulb size specifications across the vehicle's manufacturing range.
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-based housings, 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 S2125 uses the H6024 for both high beam and low beam headlight positions across the 1980-1981 model years. A single bulb type serving both functions is characteristic of older sealed beam systems, where one unit handles the dual-filament role.
Because the H6024 is a sealed beam unit rather than a replaceable bulb, fitment involves swapping the complete assembly. Compatibility depends on the standardized 7-inch round form factor defined by ANSI, which allows interchangeability among vehicles specifying the same sealed beam standard.