International S1955 high beam and low beam headlight bulbs both utilize the H6024 size. The replacement chart covers 1981 to 1989 vehicle production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The H6024 is the sole bulb type specified across all headlight positions on the International S1955 for the 1981-1989 model years, covering both high beam and low beam functions.
The H6024 is a 7-inch round sealed beam unit operating at 12 volts, conforming to ANSI standards recognized in the United States and Canada.
A sealed beam unit integrates the filament, reflector, and lens into a single fused glass assembly, meaning the entire unit is replaced rather than an internal bulb component.
Because the H6024 serves both the high beam and low beam positions on the International S1955, the same sealed beam unit type is used across all headlight sockets on the vehicle.
The ANSI standardization of the H6024 means that any compliant unit from different manufacturers sharing that designation is dimensionally and electrically equivalent, which allows for broad parts interchangeability within that standard.