The 800-0333-500 is a base part number for an 800 series non-dimming, sub-miniature press-to-test incandescent indicator. It is designed for use in 3-terminal assemblies and is associated with a transparent yellow (amber) lens color. This indicator base mounts in a 15/32" clearance hole using a 15/32-32 NS thread and is compatible with T-14 bulbs with a midget flange base. The component meets or exceeds the requirements of MIL-L-7961B and MIL-L-3661, with its corresponding complete assembly designated as MS25041-8. The built-in press-to-test feature provides a critical safety factor by allowing instant lamp checks, making it ideal for aerospace and industrial control panel applications.