The International A100 Truck uses H6024 bulb size for both high beam and low beam headlight applications. The replacement chart covers vehicle production spanning 1957 to 1958.
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 listed positions and years for the International A100 Truck, covering both high beam and low beam headlight functions for 1957-1958.
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 non-serviceable assembly, meaning the entire unit requires replacement rather than an internal bulb component.
The H6024 serves dual roles in this application, functioning as both the high beam and low beam headlight, which is a characteristic of single-filament or dual-filament sealed beam configurations used in four-headlight systems of that era.
Because the H6024 is a sealed beam type, fitment is governed by the physical housing and retaining ring of the vehicle rather than a bulb socket, making dimensional compatibility of the 7-inch round form factor a primary consideration during replacement.