031-0135-300 is a white incandescent panel mount indicator designed for 1" mounting hole installations with a friction-fit cap design. The indicator features a candelabra screw base incandescent lamp with a voltage range of 6–250V, providing flexible compatibility across various electrical systems. The base is constructed from nickel-plated brass, while the cap is made from polycarbonate with a chrome-plated brass bezel, ensuring durability and corrosion resistance. This indicator is commonly used in industrial control panels, machinery status displays, and equipment monitoring applications where reliable visual indication is required.