The CS Series LEDs provide a small diameter indicator for tough applications and water-tight usage. Specifically designed with a neoprene gasket/washer to seal out water, the CS LEDs feature a drop-in fit for a standard small size 0.236 in. diameter hole. For greater stability than a snap-in design, the CS LEDs offer secure and easy fastening with hex nuts and spacers for panel mount applications. Made with a tough reflective, nickel-plated brass housing, the LEDs are ideal for control panels, instrumentation, and front panel fault indicators that are exposed to harsh environmental conditions.