Q: What mounting style is the Flex-Mount Voltage Indicator (R-3D2) configured in when shipped from the factory?

A: The unit is shipped preassembled for mounting in a ¾” K.O. Alternative mounting for M20 K.O. mount is as follows: remove K.O. adapter and the ¾” outer O-ring. Insert the supplied channel ring in the outer channel. Regardless of mounting methods, for the best O-ring sealing performance, verify the external contact surface is clean, flat, and free of debris.