International S1723 headlight bulbs utilize H6024 size for both high and low beam applications. The replacement chart covers 1980 to 1985 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 International S1723 uses the H6024 bulb size across both the high beam and low beam headlight positions for the full 1980-1985 model range.
The H6024 is an ANSI-standardized sealed beam unit recognized across the United States and Canada, operating at 12 volts.
As a sealed beam design, the H6024 houses the filament, reflector, and lens within a single fused glass unit. When the filament fails, the entire assembly is replaced rather than an internal bulb.
The H6024 follows a 7-inch round form factor, a standardized size that allows for cross-brand fitment as long as the replacement unit also carries the H6024 designation.
Because both the high beam and low beam positions share the same H6024 specification on the International S1723, a single sealed beam unit type serves the full headlight system on this vehicle.
The ANSI standardization of the H6024 means that units from different manufacturers are dimensionally and electrically interchangeable, provided the H6024 designation is confirmed on the replacement part.