International S1724 front and rear side marker bulbs both use 168 bulb size specifications. The replacement chart covers 1980 to 1984 vehicle production years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The International S1724 uses the 168 bulb for both front and rear side marker positions across the 1980-1984 model years.
The 168 is a miniature wedge bulb of the T10 type, operating at 12 volts with a power draw of 4.9 watts.
The T10 wedge base design requires no metal socket pins, as the bulb is held in place by the tension of the housing itself.
The 168 bulb conforms to ANSI standards recognized in both the United States and Canada, indicating a standardized output and base specification.
Because the same bulb size is specified for both the front and rear side marker positions, a single bulb type serves all four side marker locations on the vehicle.
The 168 and the closely related 194 are both T10 wedge bulbs, though they differ in wattage. The 194 operates at 3.8 watts, making it a lower-output alternative that is not a direct equivalent to the 168 in applications where wattage is a factor.