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The David Clark NX321005B / 09851P-37 Push-to-Talk (PTT) Switch is a genuine replacement component engineered for aviation headset and communications systems.
OEM David Clark spare part delivering reliable PTT performance in headset systems.
Rugged push-to-talk switch design built to withstand high-noise cockpit and ground-crew environments.
Compact, lightweight construction simplifies installation and integrates with headset wiring systems.
Designed for use with David Clark headset communications systems — ideal for repairs or upgrades.
This PTT Switch from David Clark offers professional-grade performance for pilots and technicians who demand clarity and reliability. The NX321005B / 09851P-37 module enables quick push-to-talk activation with crisp tactile response, ensuring clear radio transmissions even in challenging noise environments. Compatible with the same headset families and wiring frameworks used by David Clark, this switch is ideal for refurbishment, replacement, or service of aviation-grade headsets. Installation is straightforward for anyone familiar with David Clark wiring and headset components, making it an excellent choice for maintenance shops and individual pilots alike.
Part Number: 09851P-37 / NX321005B
Type: Momentary Push-to-Talk (PTT) Switch
Function: Single-button transmission control for aviation headsets
Compatibility: David Clark headset communication systems and accessories
Best priced around great and speedy service!
Also is the better of the 2 options since it is rated at 5,000 psi, not that I go to that high of pressure but I like the safety and security knowing that my chances of it blowing up in my face are a whole lot better and I can also purchase replacement seals for them at the same shop!!!
I bought the DC PTT because I know and trust the DC quality/durability to hold up to using every day. And so far it’s the best PTT I’ve used. I have a couple other no-name PTTs and the cable sheathing is crumbling and falling off. The DC PTT has worked even in sub zero cabin temp conditions when I didn’t have a functioning heater. I bought two to have a spare but the first one has been working great for 300hrs so far.
