David Clark H8590 Headset Parts Guide & Illustrated Catalog

David Clark H8590 Headset Parts Guide & Illustrated Catalog

Written by: Pilots HQ Staff

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Time to read 7 min

Keep your H8590 flying strong with our complete breakdown of features, parts, and upgrade options.

The David Clark H8590 headset is renowned for its single-ear design, making it a top choice for pilots who need to maintain situational awareness while communicating clearly. Its noise-canceling capabilities, provided by the M-2H dynamic microphone, ensure that your transmissions are crisp and intelligible, even in the most challenging environments. This feature is particularly beneficial for pilots operating in high-noise settings, such as cockpits with open windows or near loud machinery.


With its lightweight build, the H8590 offers comfort during long flights, reducing fatigue and allowing pilots to focus on their tasks. The headset's compatibility with various audio systems is facilitated by its versatile comm cord, making it a reliable choice for diverse aviation needs. The H8590's design prioritizes both functionality and comfort, ensuring that pilots can rely on it for extended use without discomfort.


This guide provides a detailed look at the H8590's parts, specifications, and maintenance tips. Whether you're looking to replace a worn component or simply want to understand your headset better, this comprehensive breakdown will help you keep your H8590 in peak condition. Explore the parts catalog, learn about potential upgrades, and discover the accessories that can enhance your flying experience.

The H8590 is a single-ear pro audio headset with noise-canceling capabilities.

Features the M-2H dynamic microphone, ideal for high-noise environments.

Compatible with a wide range of audio systems due to its versatile comm cord.

Lightweight design ensures comfort during extended use.

Official parts list includes ear seals, headpad, and microphone assembly.

All parts are verified against the official David Clark IPC and Pilots HQ catalog.

Why Pilots Love the David Clark H8590

  • Single-ear design allows pilots to maintain situational awareness while communicating effectively.
  • The M-2H dynamic microphone provides excellent noise-canceling capabilities, ensuring clear transmissions.
  • Lightweight construction reduces fatigue during long flights, enhancing overall comfort.
  • Compatible with a wide range of audio systems, thanks to its versatile comm cord.
  • Durable materials and construction ensure longevity and reliability in demanding environments.
  • Easy-to-replace parts, such as ear seals and headpads, extend the headset's lifespan.
  • Official parts list includes all necessary components for maintenance and repairs.
  • Every part number is cross-referenced with the official David Clark IPC and Pilots HQ catalog for accuracy.

Specs at a Glance

  • Model Number: H8590
  • Part Number: 40722G-03
  • Microphone: M-2H Dynamic Microphone
  • Design: Single-ear

Noise Attenuation


The H8590 headset features passive noise attenuation, primarily achieved through its single-ear design and the use of high-quality ear seals. These seals create a tight fit around the ear, effectively blocking out ambient noise and allowing the pilot to focus on communications. The ear seals are a critical component in maintaining this noise reduction capability, and over time, they can wear out or become less effective.


When the ear seals start to degrade, pilots may notice an increase in background noise, which can be distracting and reduce communication clarity. Replacing the ear seals with new ones, such as the Undercut Gel Earseal (pair, part number 40863G-02), can restore the headset's original noise attenuation performance. Regular inspection and timely replacement of these seals are essential for maintaining the H8590's effectiveness in noisy environments.

What's the difference between the David Clark H8590 and H8595?

The David Clark H8590 and H8595 are both single-ear pro audio headsets designed for environments where clear communication is critical. However, there are some key differences between the two models. The H8590 features the M-2H dynamic microphone, which is known for its excellent noise-canceling capabilities, making it ideal for high-noise settings. In contrast, the H8595 may offer different microphone specifications or additional features tailored to specific audio environments.


In terms of parts compatibility, both headsets share a similar design, which means that many components, such as ear seals and headpads, are interchangeable. This compatibility can simplify maintenance and repairs, as pilots can use the same parts for both models. However, it's always important to verify part numbers to ensure proper fit and function.


Key Differences:

  • Microphone: H8590 uses the M-2H dynamic microphone, while the H8595 may have different specifications.
  • Application: Both are suited for high-noise environments, but the H8595 may offer additional features for specific needs.

👉 For pilots looking for a reliable single-ear headset with proven noise-canceling capabilities, the H8590 remains a strong choice, especially when parts compatibility with the H8595 is a consideration.

Illustrated Parts Catalog

David Clark H8590 Parts Diagram
David Clark

David Clark H8590 Parts List

  1. Undercut Gel Earseal (pair) — 40863G-02
  2. Filter (1 each) — 14096P-09
  3. Dome Filter (1 each) — 25629P-03
  4. Screw/Grommet Kit (4 pk) — 18900G-47
  5. Earphone Assembly — 10376G-89
  6. Headpad Restraint, Foam — 40266G-01
  7. Temple Pad Assy Kit — 18900G-37
  8. Headpad Assembly — 18900G-45
  9. Headband Spring — 15093P-03
  10. Filter (1 each) — 26475P-08
  11. Volume Control — 09349P-34
  12. Stirrup & Clamp Kit — 22378G-15
  13. Volume Control Knob — 15109P-01
  14. Retaining Ring (10/pk) — 00009M-03
  15. Left Dome — 15253P-10
  16. Boom Attachment Kit — 12840G-19
  17. Mic Boom Assembly — 18740G-34
  18. Microphone M-2H (150 OHM) — 09168P-76
  19. Mic Protector — 40062G-06
  20. Comm Cord Kit — 18028G-84

H8590 Item # 1 - 12

H8590 Item # 13 - 24

Electrical Schematic

David Clark H8590 Electrical Schematic

Comfort Upgrades Worth Considering for Your David Clark H8590

Looking to make your David Clark H8590 even more comfortable? These two upgrades are customer favorites:


Double-Foam Head Pad Kit (40688G-36):

The Double-Foam Head Pad Kit offers enhanced cushioning, reducing pressure on the head during long flights. Its dual-layer foam design provides superior comfort and support, making it an excellent upgrade for pilots who spend extended periods in the cockpit.


👉 Consider this upgrade if you frequently experience discomfort from prolonged headset use.

Comfort-Gel Undercut Ear Seals (40863G-02):


These ear seals provide a snug fit and excellent noise isolation, enhancing the passive noise reduction of your H8590. The gel material conforms to the shape of your ear, offering a comfortable seal that minimizes pressure points.


👉 Ideal for pilots who prioritize noise isolation and comfort.

Maintenance Tips for Your David Clark H8590

  • Regularly inspect the ear seals (part number 40863G-02) for wear and replace them as needed to maintain optimal noise attenuation.
  • Check the headpad assembly (part number 18900G-45) for signs of wear or discomfort and consider upgrading to a double-foam head pad for added comfort.
  • Ensure the comm cord kit (part number 18028G-84) is free from damage or fraying to maintain clear communication.
  • Keep the microphone protector (part number 40062G-06) clean to ensure optimal noise-canceling performance.
  • Store your headset in a protective case when not in use to prevent damage and extend its lifespan.

By following these maintenance tips, you can ensure your H8590 remains in top condition, providing reliable performance for every flight.

Adapters for the David Clark H8590


Enhance the versatility of your David Clark H8590 with these adapters, designed to expand connectivity options and improve functionality:

Accessories for the David Clark H8590

Complete your David Clark H8590 experience with these essential accessories, designed to enhance functionality and convenience:

Genuine David Clark Parts, Fast Shipping

At Pilots HQ, we believe our job isn't finished when you buy a headset. We go further by offering:

  • Expert Education: Guides, blogs, and resources that explain how to care for and get the most from your David Clark H8590, including maintenance tips and parts breakdowns.
  • Maintenance Reminders: Helpful tips on when to replace ear seals, cords, and head pads to keep your H8590 comfortable, reliable, and ready for every flight.
  • Trusted Inventory: Only genuine David Clark headsets, adapters, and replacement parts — no imitations.
  • Fast, Reliable Shipping: Get what you need quickly, so your flying isn't delayed by missing parts.
  • Pilot-Focused Service: Our team understands aviation and is here to help you choose the right headset, adapter, or replacement component for your aircraft and mission.

👉 With Pilots HQ, you're not just buying products — you're investing in long-term comfort, clear communication, and confidence every time you fly.

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David Clark Company

How do I replace the ear seals on my H8590?

To replace the ear seals, simply remove the old seals and attach the new Undercut Gel Earseal (part number 40863G-02) for optimal noise isolation.

What should I do if the microphone on my H8590 isn't working?

Check the Mic Boom Assembly (item 17, part number 18740G-34) for any visible damage. If the issue persists, consider replacing the M-2H microphone (part number 09168P-76).

Can I use parts from the H8595 on my H8590?

Yes, many parts such as ear seals and headpads are interchangeable between the H8590 and H8595, but always verify part numbers for compatibility.

How can I improve the comfort of my H8590 during long flights?

Consider upgrading to the Double-Foam Head Pad Kit (part number 40688G-36) for enhanced comfort and reduced pressure on the head.

What is the most common cause of audio issues in one ear with the H8590?

The most common cause is a faulty comm cord. Inspect the Comm Cord Kit (item 20, part number 18028G-84) for damage and replace if necessary.

How often should I replace the headpad on my H8590?

Replace the headpad (part number 18900G-45) when it shows signs of wear or discomfort. Regular replacement ensures maximum comfort and longevity.

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Pilots HQ LLC.

Pilots HQ Staff

At Pilots HQ, we’re more than just a store — we’re a crew of aviation enthusiasts and support staff dedicated to helping pilots and professionals get the gear and service they need. Our team shares insights, tips, and stories to keep you flying with confidence.