The 800-0332-500 is a sub-miniature incandescent press-to-test indicator designed for back-of-panel mounting in a 15/32" clearance hole, featuring a green transparent lens and non-dimming mechanical shutter semi-blackout design. This indicator meets or exceeds the requirements of MIL-L-7961B and MIL-L-3661 military standards and incorporates a patented press-to-test mechanism that allows operators to verify lamp functionality instantly without removing the assembly. The unit features a T-1¼ bulb with midget flange base, aluminum mounting bushing and lens holder with black anodize finish, brass terminals with hot tinned elongated slots, and an internal-tooth lockwasher with phosphor bronze white nickel finish. The indicator is designed for 3-terminal press-to-test applications with a maximum panel thickness of 5/16" and a maximum projection of 7/8" back of panel. This product is ideal for military and aerospace applications requiring reliable status indication with built-in test capability and positive safety factors.