The 103-1232-403 is an incandescent panel mount indicator designed for oiltight applications with a 1" mounting hole. It features a green polycarbonate cap with chrome-plated brass bezel and a nickel-plated brass base housing a candelabra screw base incandescent lamp. The indicator operates across a voltage range of 6–250V, providing reliable visual signaling in industrial and control panel environments. The oiltight design with "O" rings ensures protection against oil and moisture ingress, making it suitable for harsh operating conditions. Common applications include machinery status indication, process monitoring, and control panel signaling where durability and environmental resistance are required.