The DIALIGHT 616 series panel mount LED indicators are designed for a variety of applications requiring visual indication. These indicators feature long life, low power consumption, and generate minimal heat. They are RoHS compliant and available in red, green, and yellow colors, making them suitable for power indication, status indication, maintenance warnings, and instrumentation. The indicators mount through a 0.642 inch (16.3 mm) hole and are designed for use with a lock washer and nut, with a recommended torque of 0.217 lbs/ft or 3 Kg/cm. The operating temperature range is -25ºC to +85ºC.