The 081-0135-203 is a white convex non-diffused lens cap designed for the Dialight 373 Series indicator base assembly. This component features a T-3 1/4 miniature bayonet bulb base interface and is engineered for mounting in an 11/16" clearance hole (.688" diameter) with a panel cutout of .660" ± .003". The lens cap incorporates mechanical dimming options that provide adjustable intensity of light emission, with the ability to transition from open to complete blackout positions. The assembly is watertight, meets MIL-L-3661C military requirements, and is suitable for demanding applications including ground vehicles, aircraft cockpits, naval vessels, and surveillance systems where reliable visual indication is critical.