The 103-0901-05-103 is an incandescent panel mount indicator designed for oiltight applications with a 1" mounting hole. It features a candelabra screw base incandescent lamp rated for 6–250V operation and uses S-6 lamp specifications. The base is constructed from nickel-plated brass with an "O" ring seal for oiltight protection, and the cap is made of polycarbonate with a chrome-plated brass bezel. The indicator has a maximum bezel dimension of 25.40 mm (1.00 inch) and mounting thread of 1" - 27 NS, providing secure installation in industrial control panels and equipment requiring oil-resistant sealing. This product is ideal for harsh environments where moisture and oil ingress must be prevented while maintaining visual status indication.