Helicopter Socket to GA Dual Plugs

If you fly helicopters you’ll most likely be looking for a headset with a single plug. It’s slightly shorter and fatter than either of the fixed wing plugs. This single plug (7.1 mm / 0.281 inch diameter) provides both microphone and audio to the ear cups. It’s generally known as a U-174/U plug or the U-93A/U plug (Nexus TP120).

For most of the fixed wing airplanes, you’ll be best served with the standard dual male plugs. These are known as the PJ-055 (.25 inch / 6.35mm) and PJ-068 (.206 inch / 5.25mm) plugs. The PJ-055 provides audio to the ear cups and the PJ-068 is for your microphone.