International S1954 high beam and low beam headlight bulbs both use the H6024 size. The replacement chart covers 1981 to 1990 vehicle production years with bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International S1954 uses the H6024 bulb size across both the high beam and low beam headlight positions for every model year from 1981-1990.
The H6024 is an ANSI-standard 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 internal bulb component.
The H6024 follows a 7-inch round form factor, which is a standardized size that allows for cross-brand fitment compatibility within that specification class.
Because the high beam and low beam positions share the same H6024 specification on the International S1954, both functions are served by physically identical units.
The ANSI standardization of the H6024 means that any compliant unit from different manufacturers is expected to meet the same electrical and physical requirements, provided it carries the correct designation.