The International S1853 uses H6024 bulb size for both high beam and low beam headlight applications. The replacement chart covers vehicle production spanning 1981 to 1989.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International S1853 uses the H6024 bulb size across both the high beam and low beam headlight positions for the full 1981-1989 model range.
The H6024 is an ANSI-standardized sealed beam unit recognized in both the United States and Canada, operating at 12 volts.
A sealed beam unit integrates the filament, reflector, and lens into a single housing, meaning the entire assembly is replaced rather than an individual bulb element.
The H6024 follows a 7-inch round form factor, which is a standardized size shared across many vehicle applications of that era, making cross-brand fitment relatively straightforward when the ANSI designation matches.
Because the H6024 serves both the high beam and low beam positions on the International S1853, a single replacement unit type covers both headlight functions on this vehicle.
The ANSI standardization of the H6024 means that units from different manufacturers carrying the same designation are expected to conform to the same electrical and physical specifications.