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Flight Helmet Adapter for KNG

Original price $365.00 - Original price $365.00
Original price
$365.00 - $365.00
Current price $365.00


The Flight Helmet Adapter allows you to connect the nexus plug of your helicopter flight helmet to the side port of your Bendix King handheld radio for easy, cost effective, communications on wildland fire incidents.  This PTT aviation adapter  uses the PTT button to key up your handheld radio and communicate through the mic in your flight helmet.


  • Bendix King KNG P150
  • Bendix King KNG P150S
  • Bendix King KNG P150-CMD
  • Bendix King KNG P400
  • Bendix King KNG P400S


Our flight helmet adapters are compatible with many helmets that use a Nexus U-174 connector. There are 2 common wiring standards for this connector. Our adapters use the Peltor wiring standard for this connector which is also compatible with NATO / UK (most civilian helicopter flight helmets in the US use this standard), however there are some flight helmets that use the NATO / US wiring standard for this connector. There are some slight differences in the NATO / US and NATO / UK connectors (pictured below) that will help you determine which connector your helmet has.

NATO-UK / Peltor U-174 Helicopter flight helmet communications connector.


NATO-UK / Peltor U-174 wiring standard.

The image above is the compatible wiring for this item.

NATO-US U-174 Helicopter flight helmet communications connector.

NATO-US U-174 wiring standard.

This is also a compatible connector, but not when wired to US military standards; however, many companies wire this connector to the Peltor standard. Some companies will even wire this connector to either standard based on customer preference. 

While we can help you determine which connector you have, it is impossible for us to know exactly which wiring standard was used. While the vast majority of US civilian flight helmets are compatible, if you are still unsure, often you can find out from the manufacturer of your helmet which wiring standard was used. 


  1. What connector does this adapter use?
    Nexus PTT (M9177/5-1 U-94A/U)

  2. What wiring standard was the Nexus plug wired to?
    Our adapters are wired to Peltor or "Helicopter" standard.

  3. Which Mic does the helmet need to have for proper usage?
    The adapter is designed to work with a civilian standard mic.


* Also known as: ACS 988-3 Air Com NFES 5328 NIFC.

Awesome Because:

You can connect your Bendix King handheld radio to your existing flight helmet instead of buying a new headset!

Makes contracting with CalFire or USFS easier and less expensive.

Radio Compatibility
  • KNG-P
  • KNG-P S
  • KNG2-P

More Details

Aviation Flight Helmet Adapter with U174/U for Relm BK KNG & KNG2

  • Color: Black
  • Replaces Products: AABA1442
  • What's Included: Adapter