169-1193-203 is a yellow non-diffused stovepipe lens cap with internal fluting designed for Dialight 377 Series indicator bases. This lens cap features a watertight screw-on design and is compatible with T-3 1/4 miniature bayonet mounting systems, meeting MIL-L-3661C requirements. The cap is constructed with internal fluting for enhanced optical performance and is part of a modular indicator assembly system where the base, bulb, and cap are purchased separately. It is commonly used in ground vehicles, surveillance systems, power distribution centers, aircraft cockpits, naval vessels, and other demanding applications requiring reliable visual indication in harsh environments.