The International 1000D headlight bulb uses an H6024 size for both high beam and low beam applications. This replacement chart covers vehicle production spanning 1969 to 1970.
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-and-housing systems, 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 1000D uses the H6024 for both the high beam and low beam headlight positions across the 1969-1970 model years. A single bulb type therefore serves both lighting functions on this vehicle.
Because the H6024 is a sealed beam unit rather than a socketed bulb, fitment involves replacing the whole optical assembly. This is a distinct servicing consideration compared to vehicles that use separate replaceable bulbs within a retained housing.