The 125-1135-403 is a white cap component intended for use with the 125 series of oiltight panel mount indicators. This cap is constructed from durable polycarbonate and features a chrome-plated brass bezel for a secure fit and professional appearance. It is specifically designed to be part of an assembly that fits into an 11/16-inch mounting hole. The oiltight rating of the series ensures reliable performance in industrial environments where exposure to oils and contaminants is a concern. When combined with a compatible base and lamp, this cap completes a robust indicator light assembly for machinery and control panels.