The TP-120 plug is used for civilian helicopter cords and military aviation cords. We use this plug instead of the U-174 plug. We feel the TP-120 plug holds onto the cord better than a U-174.  (U-174 plugs can be ordered upon request.) This plug mates with the U-92 Jack.

Wiring Configuration:

Microphone High to Pin 1

Earphone High to Pin 2

Microphone Low (and shield) to Pin 3

Earphone Low to Pin 4

Other items you may need:

U-92 Cord Jack