International L151 headlight bulbs utilize H6024 size bulbs for both high and low beam functions. The replacement chart covers 1951 to 1952 vehicle production years with corresponding bulb size specifications.
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 recognized in both the United States and Canada.
Unlike bulb-and-housing systems, the H6024 does not contain a replaceable bulb element. The entire sealed beam unit is replaced as a single assembly when the light fails.
The International L151 uses the H6024 for both high beam and low beam headlight positions across the 1951-1952 model years. A single bulb type therefore serves both lighting functions on this vehicle.
Because the high beam and low beam positions share the same H6024 specification, the two units are interchangeable with each other in terms of part number, though their mounting positions in the headlight assembly remain distinct.