The 081-0113-203 is a Dialight 373 Series indicator base designed for mounting in an 11/16" clearance hole (.688") with a T-3 1/4 miniature bayonet bulb base. The base features a brass housing with black nickel finish, brass solder terminals with hot tinned elongated slots, and includes a mounting nut (brass, white nickel finish) and internal-tooth lockwasher (phosphor bronze, white nickel finish). It is rated as watertight and meets MIL-L-3661C requirements with military cross-reference LH76/3. The product supports convex lens cap options in non-diffused, translucent, and diffused variants with mechanical dimming capabilities for adjustable light intensity. This indicator base is commonly used in ground vehicles, power distribution centers, command and control centers, aircraft cockpits, naval vessels, and surveillance systems where reliable visual indication and environmental protection are required.