The David Clark 18253G-05 adapter was designed to convert Military Headsets, like the David Clark H10-66
, from a U-174/U or U-93A/U to M642/5-1 (PJ068) and M642/4-1 (PJ055) required in General Aviation Aircraft. This unit can also be used to convert Single Plug Helicopter Headsets to a Dual Plug configuration for use in Fixed Wing flying.
Note: this unit does will not allow Low Impedance Military headsets to be used in HI-Impedance environments. For this application SkyGeek recommends the David Clark 40880G-01 Lo-Hi impedance adapter.