103-0537-403 is a clear polycarbonate indicator cap designed for oiltight panel mount applications with a 1" mounting hole. It features a friction-fit design with a faceted transparent polycarbonate construction and chrome-plated brass bezel, providing excellent optical clarity and durability. The cap is compatible with S-6 candelabra screw base incandescent lamps operating at 6–250V, making it suitable for industrial control panels, machinery status indication, and harsh environments requiring oiltight sealing. The nickel-plated brass base and polycarbonate cap combination ensures corrosion resistance and long service life in demanding applications.